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Enzo Biochem

enz · NYSE Healthcare
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Employees 201-500
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FY2010 Annual Report · Enzo Biochem
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Enzo Biochem, Inc.  

  Annual Report 2010

 
Enzo Biochem Today 

Enzo Biochem, Inc. is a growth-oriented integrated life sciences and biotechnology 
company focused on harnessing biological processes to develop research tools, diagnostics 
and therapeutics and serves as a provider of test services, including esoteric tests, to the 
medical community.  Since our founding in 1976, our strategic focus has been on the 
development of enabling technologies in research, manufacture, licensing and marketing of 
innovative health care products, platforms and services based on molecular and cellular 
technologies.  Enzo’s pioneering work in genomic analysis coupled with its extensive patent 
estate and enabling platforms have strategically positioned the Company to play an 
important role in the rapidly growing life sciences and molecular medicine marketplaces.  

Enzo has proprietary technologies and expertise in manipulating and modifying genetic 
material  and  other  biological  molecules.    Through  three  wholly-owned  subsidiaries,  in 
addition to the extensive intellectual property base, the Company targets its technology 
toward satisfying specific market needs. 

Enzo Life Sciences, Inc. manufactures, develops and markets functional biology and cellular 
biochemistry products and tools to research and pharmaceutical customers world-wide.  It has 
amassed a large patent and technology portfolio and is a recognized leader in labeling and 
detection technologies across research and diagnostic markets.  The Company’s strong portfolio 
of proteins, antibodies, peptides, small molecules, labeling probes, dyes and kits provides life 
science researchers tools for target identification/validation, high content analysis, gene 
expression analysis, nucleic acid detection, protein biochemistry and detection, and cellular 
analysis.  Enzo Life Sciences is  internationally recognized and acknowledged as a leader in 
manufacturing, in-licensing, and commercialization to over 9,000 in-house manufactured 
products and to distributing in excess of 30,000 products made by more than 40 other original 
manufacturers.  The Company’s strategic focus is directed to innovative high quality research 
reagents and kits in the primary key research areas of protein homeostasis, epigenetics, live cell 
analysis, molecular biology and immunoassays.  

Enzo Clinical Labs, Inc. is a growing regional clinical laboratory serving the New York, New 
Jersey and Eastern Pennsylvania medical communities.  Enzo believes having clinical diagnostic 
services allows us to capitalize first hand on our extensive advanced molecular and cytogenetic 
capabilities and the broader trends in predictive and personalized diagnostics.  Enzo Clinical 
Labs offers a menu of routine and ,increasingly, esoteric clinical laboratory tests or procedures 
used in general patient care by physicians to establish or support a diagnosis and monitor 
treatment or medication.   

Enzo Therapeutics, Inc. is a biopharmaceutical venture that has developed multiple novel 
approaches in the areas of gastrointestinal, infectious, ophthalmic and metabolic diseases, many 
of which are derived from the pioneering work of Enzo Life Sciences.  Enzo Therapeutics has 
focused its efforts on developing treatment regimens for diseases and conditions for which 
current treatment options may be ineffective, costly, and/or cause unwanted side effects.  This 
focus has generated a clinical and preclinical pipeline, as well as more than 40 patents and patent 
applications. 

To Our Shareholders: 

As we close fiscal 2010, and look forward to the new year and beyond, we are pleased to 
report that our Company today is strong, focused and well positioned to benefit from the 
new paradigms in medicine that are now increasingly being concentrated on greater 
individual diagnosis and treatment.  The advent of molecular diagnostics offers the 
opportunity for physicians to hone in on the specific nature of a disease, whether it be 
cancer or any other serious malady.  Our efforts over recent years have been directed 
heavily towards gaining a significant foothold in this fast-growing field that some 
analysts estimate could approach $50 billion within five years. 

Key Objectives

Our transitional program this past year, following up on steps that we have taken 
previously, has been directed at the following: 

• Positioning our Company to take advantage of new diagnostic, treatment and 

product developments in the health care industry. 

• Capitalizing on our strengths in Life Sciences, Diagnostic Services and 

Intellectual Property. 

• Optimizing research and development  activities to maximize commercialization 

opportunities.
Improving gross margins. 

•
• Reducing expenses. 
• Streamlining the organization for greater efficiency. 
• Generating positive operating cash flow. 

To accomplish these goals, we have taken a comprehensive approach to implement 
process improvements and pare expenses across all operating businesses as well as 
corporate, a process that also involved headcount realignments.  These and other moves, 
such as concentrating our Life Science product mix into higher margin products, resulted 
in inventory write-downs of $1.3 million and severance charges that approximated $0.5 
million.  However, with over $33 million in cash and highly liquid investments, and no 
debt at July 31, 2010, we remain in a very solid financial position, and anticipate that in 
2011 we will approach positive operating cash flow as a result of these efforts and 
internal growth.  

1

Enzo Life Sciences – A Notable Year of Consolidation

Enzo Life Sciences over the past three years made several acquisitions and fiscal 2010 
was notably a year of consolidation to achieve greater integration.  This strategy is 
already yielding positive results. Research and development activities have been 
centralized, as has manufacturing and customer services.  Today, we market and supply 
approximately 40,000 products to research, educational and medical laboratories around 
the world, of which almost 25% is produced in-house.  The balance represents alliances 
we have with other specialist life science providers.

What is especially significant is the vigor of our Life Sciences activities.  Higher margin 
products, we anticipate, will result in greater profitability.  But also in line with our 
blueprint to expand our bandwidth in the clinical research area we have entered into a 
number of agreements with outside parties.  A promising example is the supply and 
distribution agreement reached this past year with Cancer Genetics, which underscores 
our approach to meet rapid advances taking place in medicine.  The agreement covers our 
proprietary fluorescent dyes that increase signal intensity in the labeling of nucleic acids.
Cancer Genetics is an emerging leader in personalized medicine with products and 
services that enable cancer diagnostics and treatments tailored to specific genetic profiles 
of an individual.  This is a new frontier in medicine and we expect to be among the 
pioneers.

Enzo Clinical Labs -- Strategically Well Positioned

A key strategic initiative at Enzo Clinical Labs, where we have invested heavily in state-
of-the-art equipment and processes that are now housed in expanded facilities, has 
involved its integration with Enzo Life Sciences R&D programs.  For example, 
pharmaceutical companies are stepping-up their activities to identify and characterize 
biological markers in order to more accurately select patient populations that have a 
higher likelihood of responding to treatment.  Our Company possesses the unique 
expertise to make headway in this market because of our skills in assay development, our 
developmental and manufacturing expertise, and our New York State licensed CLIA 
certified clinical lab facility. 

Basically, however, we have changed the Clinical Labs’ culture. We have installed a 
vibrant, knowledgeable and effective management team that comprehends our strategy 
and the current opportunities in the diagnostic industry.  As a result, we have streamlined 
the Clinical Labs’ activities to bring it in line with the new medical paradigms, 
productivity has increased and its business is growing.

2

Our approach at Enzo Clinical Labs is not only to be better positioned for whatever 
impact the new health care legislation will have on reimbursements, but also to 
strengthen our strategic ability to provide higher end esoteric systems and diagnostics to 
physicians and hospitals.  We have submitted for approval an application to begin to offer 
the ColonSentry test in our service area.  This test can provide a stratification of an 
individual’s risk of developing colon cancer.  Additionally, this past year we entered into 
an agreement with MultiGEN Diagnostics to exclusively market in our service area its 
diagnostic test based on multiplex DNA sequencing.  Our laboratory’s accreditations – 
which denote certification for quality laboratory testing that meets New York State’s 
exceptionally rigorous standards -- will enable us to correlate and seek approval for 
marketing several of MultiGEN’s women’s health diagnostics, including antenatal 
infectious disease and thrombophilia panels. 

Moreover, there is growing recognition of Enzo Clinical Labs’ capabilities and the fact 
that we have staffed the unit with professionals having extraordinary credentials.  This 
has resulted in Enzo Clinical Labs’ inclusion as a provider for Empire Blue Cross/Blue 
Shield, New York State’s largest health care insurer, as of August 1, 2010.  During the 
past year, Enzo Clinical Labs also was granted a license by the Commonwealth of 
Pennsylvania, a precursor, we believe, of similar licenses for which we have applied in 
other key states.  This approach will facilitate the Clinical Labs’ growth as a national 
provider of esoteric and high value diagnostics. 

Enzo Therapeutics – Optiquel™ Launches Clinical Trial

The economics of drug discovery currently is such that development of a single product 
now costs in the hundreds of millions of dollars.  Hence, we have reduced Enzo 
Therapeutics’ scale in favor of monetizing our past considerable R&D and clinical study 
activities embracing proprietary treatments for inflammatory bowel diseases, non-
alcoholic steatohepatitis, and osteoporosis and certain bone disorders.

Meanwhile, in cooperation with the National Institute of Health’s National Eye Institute, 
we have initiated a clinical trial for Optiquel™, our oral therapeutic for the treatment of 
chronic non-infectious uveitis.  The trial will be conducted at the National Eye Institute.   
While we will share in the test costs, which will be modest, commercial rights to 
Optiquel™, should it prove efficacious, will reside with Enzo. 

3

Enzo Biochem – A Focused Global Concern

Our Company now is over 500 strong, with a good many of our people having advanced 
degrees and located in facilities we operate around the world -- from San Diego and New 
York to the UK and Switzerland.  The world of health care is changing everywhere, as 
the emphasis increasingly is shifting to cost reduction, and more targeted diagnosis and 
treatment.  Drugs are being developed that are specifically aimed at specific patient 
populations.  Molecular diagnostics is emerging as a new, vital tool.  Medical practice, to 
a degree seldom witnessed before, involves the growing integration of pharmaceutical, 
diagnostics and service providers. 

These changes present opportunity and challenges.  Change is not easy.  It requires 
recognition of the need to change, and it can prove unsettling to those it most affects. 
Owing to our determination to make changes, Enzo today is well equipped and 
financially secure in our ability to be an important part of this emerging new era of health 
care.

It is with deep gratitude that we acknowledge the dedication of our employees, and the 
support of our Shareholders and members of the Board of Directors. 

Elazar Rabbani, Ph.D.  
Chairman and CEO                                                     President 

Barry W. Weiner 

4

 
 
 
UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM 10-K 
(Mark one)

ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT 
OF 1934

For the fiscal year ended July 31, 2010 

or

TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE 
ACT OF 1934 

For the transition period from ______________ to ______________ 

Commission File Number 001-09974 

ENZO BIOCHEM, INC.

(Exact name of registrant as specified in its charter) 

New York 
(State or other jurisdiction 
of incorporation or organization) 

527 Madison Ave. 
New York, New York 
(Address of principal executive offices) 

13-2866202 
(I.R.S. Employer 
Identification No.) 

10022 
(Zip Code) 

(212) 583-0100 
(Registrant’s telephone number, including area code) 

Securities registered pursuant to Section 12(b) of the Act: 

(Title of Each Class) 
Common Stock, $.01 par value 

(Name of Each Exchange on Which Registered) 
The New York Stock Exchange 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. 

Yes

 No 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  

Yes

 No 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File 
required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the 
registrant was required to submit and post such files). 

Yes

 No 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 
1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such 
filing requirements for the past 90 days. 
 No 

Yes

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to 
the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any 
amendment to this Form 10-K 

Yes

 No 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. 
See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. 

Large accelerated filer 

Accelerated filer 

Non-accelerated filer 

Smaller Reporting Company 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act of 1934). Yes 

 No 

The aggregate market value of the registrant’s voting stock held by non-affiliates of the registrant was approximately $165,991,000 as of January 31, 
2010

The number of shares of the Company’s common stock, $.01 par value, outstanding at October 1, 2010 was approximately 38,160,000.

Portions of the definitive Proxy Statement to be delivered to shareholders in connection with the Annual Meeting of Shareholders to be 

held on or about January 14, 2011 are incorporated by reference into Part III of this annual report.  

DOCUMENTS INCORPORATED BY REFERENCE 

 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
TABLE OF CONTENTS 

Description 

Page

Part I

Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

Part II

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
(Removed and Reserved)

Item 5.

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

Part III

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

Part IV

Item 15.

Securities

Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations 
Quantitative and Qualitative Disclosures About Market Risk 
Financial Statements and Supplementary Data 
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 
Controls and Procedures
Other Information

Directors, Executive Officers and Corporate Governance 
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence 
Principal Accountant Fees and Services 

Exhibits and Financial Statement Schedules 
List of Consolidated Financial Statements and Financial Statements Schedule 
Report of Independent Registered Public Accounting Firm 
Consolidated Balance Sheets
Consolidated Statements of Operations 
Consolidated Statements of Stockholders’ Equity & Comprehensive Income (Loss) 
Consolidated Statements of Cash Flows 
Notes to Consolidated Financial Statements 
Schedule II - Valuation Accounts and Qualifying Accounts 

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58

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F-1
F-2
F-3
F-4
F-5
F-6
F-7
S-1

1

PART I

Item 1. Business  

Overview  

Enzo Biochem, Inc. (the “Company” “we”, “our” or “Enzo”) is a growth-oriented integrated life sciences and 

biotechnology company focused on harnessing biological processes to develop research tools, diagnostics and 
therapeutics and serves as a provider of test services, including esoteric tests, to the medical community. Since our 
founding in 1976, our strategic focus has been on the development of enabling technologies in research, development, 
manufacture, licensing and marketing of innovative health care products, platforms and services based on molecular and 
cellular technologies. Our pioneering work in genomic analysis coupled with its extensive patent estate and enabling 
platforms have strategically positioned the Company to play an important role in the rapidly growing life sciences and 
molecular medicine marketplaces.  

In the course of our research and development activities, we have built a substantial portfolio of intellectual 
property assets, comprising 71 key issued patents worldwide, and over 200 pending patent applications, along with 
extensive enabling technologies and platforms.  

Recent Events  

In September 2010, we announced that we had streamlined our operations, which is expected to result in a 

reduction in annualized operating expenses beginning in the fiscal 2011 first quarter. These initiatives are also expected 
to result in increased gross margins. The operating cost reductions affect all of our operating businesses as well as 
corporate overhead. The overall improvements are primarily a result of streamlining operations at Enzo Life Sciences, 
where we completed a series of acquisitions over the past three years, and Enzo Clinical Labs, where we have invested 
significantly over the past year in technology and process improvements.  

At Enzo Clinical Labs, we expect gross margin improvements and expense reductions, primarily through selective 

work force rationalization and process improvements, including customer service and billing designed to reduce 
processing and collection costs of receivables, improved laboratory service operations and lower reagent costs. At Enzo 
Life Sciences, as a result of the acquisitions that we have completed, certain operations have become redundant, which 
provided opportunities to reduce costs through realignment or centralization of R&D, customer service and manufacturing 
activities. Enzo Life Sciences has also undertaken a repositioning of its product offerings, refocusing its marketing efforts 
on higher-margin, higher volume products. As a result, we recorded a charge in the fiscal 2010 fourth quarter of $1.3 
million as certain low-volume products were rationalized. We expect the benefits of the operational improvements to occur 
commencing with our fiscal 2011 first quarter ending October 31, 2010. In connection with the streamlining, we also 
recorded a one-time charge of approximately $500,000 in its fiscal 2010 fourth quarter to reflect severance payments to 
terminated employees.  

Operating Segments  

We are comprised of three operating segments, of which the Therapeutics and Life Sciences segments have 

evolved out of our core competencies: the use of nucleic acids as informational molecules and the use of compounds for 
immune modulation. Information concerning sales by geographic area and business segments for the years ended July 
31, 2010, 2009 and 2008 is located in Note 17 in the Notes to Consolidated Financial Statements.  

Below are brief descriptions of each of our operating segments:  

Enzo Life Sciences manufactures, develops and markets functional biology and cellular biochemistry 
products and tools to research and pharmaceutical customers world-wide and has amassed a large patent 
and technology portfolio. Enzo Life Sciences, Inc. is a recognized leader in labeling and detection 
technologies across research and diagnostic markets. Our strong portfolio of proteins, antibodies, peptides, 
small molecules, labeling probes, dyes and kits provides life science researchers tools for target 
identification/validation, high content analysis, gene expression analysis, nucleic acid detection, protein 
biochemistry and detection, and cellular analysis. We are internationally recognized and acknowledged as a 
leader in manufacturing, in-licensing, and commercialization of over 9,000 of our own products and in addition 
distribute over 30,000 products made by over 40 other original manufacturers. Our strategic focus is directed 
to innovative high quality research reagents and kits in the primary key research areas of protein 
homeostasis, epigenetics, live cell analysis, molecular biology and immunoassays.  

2

The segment is an established source for a comprehensive panel of products to scientific experts in the fields 
of Natural Products/Antibiotics, Autophagy, Cancer, Cell Cycle, Cell Death, Cell Signaling, Cellular Analysis, 
Endocrinology/Hormones, DNA regulation, Compound Screening, Genomics/Molecular Biology, GPCRs, 
Immunology, Inflammation, Metabolism, Neuroscience, Nitric Oxide pathway, Obesity/Adipokines, Oxidative 
Stress, Proteases. Proteosomes, Protein Expression and modification, Signal Transduction, Stress/Heat 
Shock proteins and Ubiquitin/Ubl signaling. 

Enzo Clinical Labs is a regional clinical laboratory serving the New York, New Jersey and Eastern 
Pennsylvania medical communities. The Company believes having clinical diagnostic services allows us to 
capitalize first hand on our extensive advanced molecular and cytogenetic capabilities and the broader trends 
in predictive and personalized diagnostics. Enzo Clinical Labs offers a menu of routine and esoteric clinical 
laboratory tests or procedures used in general patient care by physicians to establish or support a diagnosis, 
monitor treatment or medication, and search for an otherwise undiagnosed condition. We operate a full-
service clinical laboratory in Farmingdale, New York, a network of approximately 30 patient service centers 
throughout New York and New Jersey, a stand alone “stat” or rapid response laboratory in New York City and 
a full-service phlebotomy and logistics department.  

Enzo Therapeutics is a biopharmaceutical venture that has developed multiple novel approaches in the 
areas of gastrointestinal, infectious, ophthalmic and metabolic diseases, many of which are derived from the 
pioneering work of Enzo Life Sciences. Enzo Therapeutics has focused its efforts on developing treatment 
regimens for diseases and conditions for which current treatment options are ineffective, costly, and/or cause 
unwanted side effects. This focus has generated a clinical and preclinical pipeline, as well as more than 40 
patents and patent applications.  

The Company’s primary sources of revenue have historically been from product revenues and royalty and 

licensing of Life Sciences’ products utilized in life science research and from the clinical laboratory services provided to 
the healthcare community. The following table summarizes the sources of revenues for the fiscal years ended July 31, 
2010, 2009 and 2008, (in $000’s and percentages):  

Fiscal year ended July 31, 

2010 

2009 

2008 

Product revenues  ............................... 
Royalty and license fee income  ......... 
Clinical laboratory services  ................ 
Total  ................................................... 

$ 43,111 
9,793 
44,178 
$ 97,082 

44%  $ 40,592 
9,376 
10 
  39,604 
46 
  100%  $ 89,572 

45%  $  28,087 
7,630 
11 
42,078 
44 
100%  $  77,795 

36%
10 
54 
100%

Markets

Background  

Deoxyribonucleic Acid (“DNA”) is the source of biological information that governs the molecular mechanisms 

underlying life. This information is stored in the linear sequences of nucleotides that comprise DNA. The sequence of the 
human genome, comprising well over 30,000 genes, has been identified by genomic research in both the public and 
private sectors, including the Human Genome Project. The ongoing challenge of the scientific research community is to 
determine the function and relevance of each gene, as well as gene to gene and gene/environment interactions. In 
addition, scientists are looking in detail at the proteins that are expressed by genes, their control and regulation in the 
cellular environment. This information will facilitate the understanding of biological mechanisms and how variations and 
mutations in such mechanisms may result in disease, enabling more rapid and accurate detection of specific diseases 
and the development of new therapeutics to treat them.  

Tools for biomedical and pharmaceutical research  

There is an increasing demand by biomedical and pharmaceutical researchers for research and diagnostic tools 

that both facilitate and accelerate the generation of biological information. This demand can be met by gene-based 
diagnostics for which a variety of formats, or tools, have been developed that enable researchers to study biological 
pathways and to identify mutations in gene sequences and variations in gene expression levels that can lead to disease. 
These tools include DNA sequencing and genotyping instruments, microarrays, fluorescent microscopes, high content 
screening systems, flow cytometers and plate readers. Common among these formats is the need for reagents that allow 
the identification, quantification and characterization, and interactions of specific genes or nucleic acid sequences, 
proteins, cells and other cellular structures and organelles.  

3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
We believe this market will continue to grow as a result of:  

• research spending by academic, government and private organizations to determine the function and clinical 
relevance of the gene sequences and proteins that have been identified by genome research;  

• development of commercial applications based on information derived from this research; and  

• ongoing advancements in tools that accelerate these research and development activities. 

Clinical diagnostics  

The clinical diagnostics market has been reported by industry sources to be greater than $22 billion annually. It is 

comprised of a broad range of tests based on clinical chemistry, microbiology, immunoassays, genomics, proteomics, 
gene expression profiling blood banking, and cancer screening assays through histology as well as newer body fluid 
based approaches. Many of these tests employ traditional technologies, such as immunoassays and cell culture 
technologies, for the detection of diseases.  

Immunoassays are based on the use of antibodies directed against a specific target, or antigen, to detect that 

antigen in a patient sample. Cell culturing techniques involve the growth, isolation and visual detection of the presence of 
a microorganism and often it’s susceptibility to FDA approved drugs.  

There are several drawbacks to these more traditional technologies. Immunoassays do not allow for early 
detection of diseases because they require minimum levels of antigens to be produced by the microorganism in order to 
be identified. These levels vary by microorganism, and the delay involved could be several days or several months, as 
seen in HIV/AIDS. Cell cultures are slow, labor intensive and not amenable to all microorganisms. For example, 
gonorrhea and chlamydia are difficult to culture.  

Gene-based diagnostics have many advantages over the traditional technologies. Since gene-based diagnostics 

focus on the identification of diseases at the cellular level, they can identify the presence of the disease at its earliest 
stage of manifestation in the body. These tests provide results more rapidly, are applicable to a broad spectrum of 
microorganisms and can easily be automated in a multiplex platform.  

Several advances in technology are accelerating the adoption of gene-based diagnostics in clinical laboratories. 

These advances include high throughput automated formats that minimize labor costs, non-radioactive probes and 
reagents that are safe to handle, and amplification technologies that improve the sensitivity of such diagnostics.  

According to industry sources, the market for molecular diagnostic tools, assays and other products is currently 

more than $5 billion per year, and is acknowledged as one of the fastest growing segments in the in-vitro diagnostic 
industry. Contributing to this growth is, among other factors:  

• 

• 

• 

• 

the increasing number of diagnostic tests being developed from discoveries in genome research;  

advances in formats and other technologies that automate and accelerate gene-based diagnostic testing; 

growing emphasis by the health care industry on early diagnosis and treatment of disease and;  

application of gene-based diagnostics as tools to match therapies to specific patient genetics commonly 
referred to as pharmacogenomics.  

Therapeutics  

As science progresses, we are learning more about biochemical processes and how the cell’s machinery is 

directed towards normal functioning of physiological, genetic and immune system pathways. Disease may result as the 
consequence of an inappropriate reaction in any of these systems.  

In the normal physiologic functioning of the body key modulators interact with membrane-bound proteins and 

initiate a cascade of biochemical reactions that regulate the cell. How modulators interact with membrane-bound proteins 
set the stage for a variety of possible activities that the cell then controls. The membrane-bound proteins are multiligand 
receptors; hence the modulator(s) and their activity at a specific binding docking “station” determine the ultimate activity of
the cell. This constitutes a cell signaling pathway. One of the most notable cell signaling pathways is the Wnt pathway and 
an associated membrane protein, LDL (low density lipoprotein) receptor-related protein LRP. Research by Enzo and 
others have unlocked the key to the activation/inhibition of the Wnt and/or LRP system resulting in the discovery and 
subsequent regulation of natural processes, such as development, cell division, and metabolic activity, among others. 
Manipulation of this system through small molecules, peptides, oligonucleotides or antibodies may possibly correct 
dysfunctional systems.  

4

Other diseases may be the consequence of an inappropriate reaction of the body’s immune system, either to a 

foreign antigen, such as a bacterium or virus, or, in the case of an autoimmune condition, to the body’s own components. 
In recent years, several new strategies of medication for the treatment of immune-based diseases such as Crohn’s 
disease, autoimmune uveitis and rheumatoid arthritis, have been developed. These treatments are all based on a 
systemic suppression of certain aspects of the immune system and can lead to significant side effects. Thus, there 
continues to be a need for a therapeutic strategy that is more specific and less global in its effect on the immune system.  

Still other diseases result from either the expression of foreign genes, such as those residing in viruses and 

pathogenic organisms, or from the abnormal or unregulated expression of the body’s own genes. In other cases, it is the 
failure to express, or over expression of, a gene that causes the disease. In addition, a number of diseases result from the 
body’s failure to adequately regulate its immune system.  

Advances in gene analysis have provided the information and tools necessary to develop drugs that interfere with 

the disease process at the genetic level. For a broad spectrum of diseases, this approach can be more precise and 
effective than interfering with downstream events such as protein synthesis or enzyme activation. Therapies targeting 
genetic processes are called gene medicines. There are two fundamental approaches to gene medicines, synthetic and 
genetic.  

Synthetic gene medicine involves the administration of synthetic nucleic acid sequences called “oligos” that are 

designed to bind to, and thus deactivate, ribonucleic acid (“RNA”) produced by a specific gene.  

To date, this approach has demonstrated limited success. Since a single cell may contain thousands of strands of 

RNA, large amounts of oligos are necessary to shut down the production of unwanted proteins. Also, they are quickly 
metabolized or eliminated by the body. Consequently, large quantities of oligos must be delivered in multiple treatments, 
which can be both toxic to the body as well as costly.  

Genetic medicine or gene therapy involves the insertion of a gene into a cell. The inserted gene biologically 

manufactures the therapeutic product within the cell on an ongoing basis. This gene may be introduced to bring about a 
beneficial effect or to disable a pathological mechanism within the cell. For example, the gene may be inserted to replace 
a missing or malfunctioning gene responsible for synthesizing an essential protein or the inserted gene may code for a 
molecule that would deactivate either an overactive gene or a gene producing an unwanted protein. As a permanent 
addition to the cellular DNA, the inserted gene produces RNA and/or proteins where needed.  

A major challenge in designing gene therapy medicines has been to enable the efficient and safe delivery of the 

gene to the appropriate target cell. Gene delivery is often accomplished using a delivery vehicle known as a vector. A 
critical quality of the vector is its ability to bind to the target cell and effectively deliver, or transduce, the gene into the cell. 
It is also critical that the nucleic acid of the vector not produce proteins or antigens that can trigger an adverse immune 
response.  

Strategy  

Our objective is to be a leading developer and provider of the tools, services, and diagnostic technologies used to 

study and identify disease at the molecular level and to be a provider of therapeutic platforms to manage specific 
diseases. There can be no assurance that our objective will be met. Key elements of our strategy involving three separate 
platforms include our ability to:  

Maximize our resources by collaborating with others in research and commercialization activities 

We enter into research collaborations with leading academic and other research centers to augment our core 

expertise on specific programs.  

In 2005, we acquired the rights and intellectual property to a candidate drug and technology intended for use in 

the treatment of autoimmune uveitis. We are collaborating with scientists and physicians in the United States and abroad 
to develop this candidate drug into a product for treating autoimmune uveitis. Through these collaborations and other 
licensing agreements we continue to develop novel therapeutics for the stimulation and enhancement of bone formation 
and glucose control, among others. Such products, if any, emanating from this technology could provide potential therapy 
for bone disorders, including bone loss, bone fractures, periodontitis, diabetes and other indications.  

We have research collaborations with other institutions including, Hadassah University Hospital in Jerusalem, 

Israel relating to our immune regulation technology. Through other collaborations we are developing our candidate drug 
Optiquel™ for autoimmune uveitis. There can be no assurance that any of these collaborative projects will be successful.  

Similarly, we seek to fully exploit the commercial value of our technology by partnering with for-profit enterprises 

in specific areas in order to act on opportunities that can be accretive to our efforts in accelerating our development 
program.  

5

Apply our biomedical research technology to the clinical diagnostics market 

We intend to develop our proprietary research technology for use in the clinical diagnostics market. We currently 

offer over 25 gene-based tests for the research market, for the identification of such viruses as human papillomavirus, 
cytomegalovirus, and Epstein-Barr virus.  

We also have an extensive library of probes for the detection of various diseases. We have developed a 

standardized testing format that can permit multiple diagnoses to be performed on the same specimen.  

Expand marketing and distribution infrastructure 

Enzo Life Sciences continues to develop its sales and marketing infrastructure to more directly service its end 

users, while simultaneously positioning the Company for product line expansion. Our acquisitions of Axxora in May 2007, 
Biomol International in May 2008 and Assay Designs in March 2009 have expanded our global sales, marketing, 
manufacturing, product development and distribution infrastructure. Enzo Life Sciences now operates worldwide through 
wholly owned subsidiaries (in USA, Switzerland, Benelux, Germany, and the UK) and a network of third party distributors 
in most other significant markets worldwide.  

Expand our collaborations with major life sciences companies 

We intend to seek opportunities to secure strategic partnerships and assert our intellectual property estate with 

multiple market participants. Further, we will look to advance proprietary business opportunities.  

In fiscal 2007, Enzo Life Sciences and Abbott Molecular, Inc. entered into a five year agreement covering the 

supply of certain Enzo Life Science’s products to Abbott Molecular for use in their fluorescence in situ hybridization (FISH) 
product line. Both companies have also entered into a limited non-exclusive royalty bearing cross-licensing agreement of 
patents for FISH systems, comparative genomic hybridization (CGH) analysis and labeling and detection technologies. 
The cross-licensing agreement includes the Company’s patents directed towards its proprietary labeling and detection 
systems as they relate to Abbott’s FISH platform. The license also provides the Company with limited access to Abbott’s 
FISH technology patents, CGH patents and various patents which relate to particular chromosome targets. These 
agreements relate to products in the field of molecular diagnostics, which is the fastest-growing segment of the 
diagnostics market, according to industry sources. FISH involves the use of labeled DNA probes which are used to 
identify specific genetic conditions. Currently, this technology is used to help diagnose and/or select therapy for certain 
cancers, such as breast, bladder, and leukemia, as well as to help diagnose genetic disorders. CGH is a molecular 
cytogenetic method for the analysis of chromosomal copy number changes (gains/losses) which are recognized as the 
underlying basis for congenital disorders and complex diseases such as cancer. See Note 14 to the Notes to 
Consolidated Financial Statements.  

The Company has a license agreement with QIAGEN Gaithersburg Inc. (“Qiagen”) that began in 2005, whereby 

the Company earns quarterly running royalties on the net sales of Qiagen products subject to the license until the 
expiration of the patent on April 24, 2018. In the license agreement, Qiagen was granted a world-wide, non-exclusive 
license to the Company U.S. Patent number 6,222,581, which is related to the use of a methodology called “hybrid-
capture” in which certain nucleic acid probes are hybridized to target nucleic acids and then captured indirectly on a solid 
surface. The resulting nucleic acid hybrids are then detected by antibodies conjugated to signal-generating molecules 
which produce an amplified signal allowing for more sensitive detection of the resultant hybrids. This platform is one of the 
most desirable formats for the detection of nucleic acids in a reliable and economic manner, and has formed the basis for 
one of the most commonly ordered genomic-based assays. See Note 13 to the Notes to Consolidated Financial 
Statements.

Apply our innovative technology to a variety of diseases mediated by cell signaling pathways, by the 

immune system, or, in advanced cases, gene therapy.

We believe our core technologies have broad diagnostic and therapeutic applications. We have focused our 

efforts on discovering how best to correct pathologies associated with bone or metabolic control, and immune-mediated 
diseases. Although the cause of disorders such as Crohn’s disease, autoimmune uveitis and non-alcoholic steatohepatitis 
(NASH) remains unknown, various features suggest immune system involvement in their pathogenesis.  

We continue to test technologies we believe can serve as enabling platforms for developing medicines that 

genetically target and inhibit viral functions, as well as medicines that regulate the immune response. In addition to such 
therapeutic products, we continue to capitalize on our nucleic acid labeling, amplification and detection technologies and 
intellectual property to develop diagnostic and monitoring tests for various diseases.  

6

Expand and protect our intellectual property estate  

Since our inception, we have followed a strategy of creating a broad encompassing patent position in the life 

sciences and therapeutics areas. We have made obtaining patent protection a central strategic policy, both with respect to 
our proprietary platform technologies and products, as well as broadly in the areas of our research activities. During Fiscal 
2010, we were awarded eleven patents and expanded our patent estate in the area of nucleotides, amplification, labeling 
and detection, among others.  

Core Technologies  

We have developed a portfolio of proprietary technologies with a variety of research, diagnostic and therapeutic 

applications.  

Diagnostic Technology Platform  

Gene analysis technology  

All gene-based testing is premised on the knowledge that DNA forms a double helix comprised of two 

complementary strands that match and bind to each other. If a complementary piece of DNA (a probe) is introduced into a 
sample containing its matching DNA, it will bind to, or hybridize, to form a double helix with that DNA. Gene-based testing 
is carried out by:  

• 

• 

• 

• 

signal.  

amplification of the target DNA sequence (a process that is essential for the detection of very small 
amounts of nucleic acid);  

labeling the probe with a marker that generates a detectable signal upon hybridization;  

addition of the probe to the sample containing the DNA and;  

binding or hybridization of the probe to the target DNA sequence, if present, to generate a detectable 

We have developed a broad technology base for the labeling, detection, amplification and formatting of nucleic 

acids for gene analysis which is supported by our significant proprietary position in these fields.  

Amplification. In the early stages of infection, a pathogen may be present in very small amounts and 
consequently may be difficult to detect. Using DNA amplification, samples can be treated to cause a pathogen’s DNA to 
be replicated, or amplified, to detectable levels. We have developed a proprietary amplification process for multicopy 
production of nucleic acid, as well as proprietary techniques for amplifying the signals of our probes to further improve 
sensitivity. Our amplification technologies are particularly useful for the early detection of very small amounts of target 
DNA and, unlike PCR (currently the most commonly used method of amplification), we have developed isothermal 
amplification procedures that can be performed at constant temperatures and thus do not require expensive heating and 
cooling systems or specialized heat-resistant enzymes.  

Non-radioactive labeling and detection. Traditionally, nucleic acid probes were labeled with radioactive 

isotopes. However, radioactively labeled probes have a number of shortcomings. They are unstable and consequently 
have a limited shelf life. They are potentially hazardous, resulting in restrictive licensing requirements and safety 
precautions for preparation, use and disposal. Finally, radioactive components are expensive. Our technologies permit 
gene analysis without the problems associated with radioactively labeled probes and are adaptable to a wide variety of 
formats.  

Formats. There are various processes, or formats, for performing probe-based tests. In certain formats, the probe 

is introduced to a target sample affixed to a solid matrix; in others the probe is combined with the sample in solution 
(homogeneous assay). Solid matrix assays include: in situ assays in which the probe reaction takes place directly on a 
microscope slide; dot blot assays in which the target DNA is fixed to a membrane; and microplate and microarray assays 
in which the DNA is fixed on a solid surface, and the reaction can be quantified by instrumentation.  

Therapeutic Platform Development  

Cell Signaling Pathway  

Our newest therapeutic platform development project involves the development of pharmaceutical agents that 
affect with protein-protein interactions. Over the past several years, our scientists and collaborators have unlocked the 
secrets of a major cell signaling pathway thus producing a means to modify biologic activity in a number of physiological 
systems.  

7

Further investigation into the design and control of this system has allowed our scientists and their collaborators 

to determine the structure of key regulatory proteins and to identify active sites that then become targets for Enzo’s 
proprietary technology generating system. Our technology is capable of generating active compounds that range from 
orally delivered small molecules to peptides, oligonucleotides or antibodies. We have performed pioneering work on the 
structure and function of LRP and its ligands, developed a screening technology to identify active compounds, and have 
synthesized proprietary molecules capable of producing biological effects in cell-based systems and animal models of 
disease. Specifically, this system allows the Company to successfully:  

• 

• 

• 

• 

• 

• 

• 

generate biological, genetic, and structural information concerning LRP;  

determine the structure of LRP docking sites of its ligands;  

identify the functionally important residues via site-directed mutagenesis;  

build the fine structure map and employ it as the basis for virtual screening;  

show that compounds specifically bind to wild type LRP5, but not to mutated LRP5;  

generate a cell-based assay capable of identifying active compounds and;  

synthesize proprietary molecules that are active in animal models of disease.  

Through this novel, proprietary, functional screening system, we have identified small molecules capable of 
reversing sclerostin-mediated inhibition of Wnt signaling. Preclinical animal studies with several candidate lead 
compounds produced the following results:  

• 

• 

• 

significant increases in total and femoral bone density through new bone formation;  

significant reduction in alveolar bone loss and;  

significant reduction in bone resorption.  

The anabolic induction of new bone formation and prevention of bone loss by our small molecule compounds may 

promise new paths for the treatment of osteoporosis.  

In addition, our proprietary technology has enabled the generation of novel chemical entities that have significant 
glucose lowering activity. These effects are separate from its effects on bone metabolism indicating a specificity of action 
conferred by the interaction of a particular compound with the cell signaling pathway. Therefore, this approach may be 
broadly applicable to the generation of therapeutic drug candidates for multiple indications.  

Immune Regulation  

Oral Immune Regulation. We are exploring a novel therapeutic approach based on immune regulation. Our 

immune regulation technology seeks to control an individual’s immune response to a specific antigen in the body. An 
antigen is a substance that the body perceives as foreign and, consequently, against which the body mounts an immune 
response. We are developing our technology to treat immune-mediated diseases, specifically autoimmune uveitis and 
Crohn’s disease.  

Gene Regulation  

We have developed an approach to gene regulation known as genetic antisense or antisense RNA. Our 
technology involves the introduction into cellular DNA of a gene that codes for an RNA molecule that binds to, and thus 
deactivates, RNA produced by a specific gene. To deliver our antisense gene to the target cell, in a process called 
transduction, we have developed proprietary vector technology.  

We believe, though there can be no assurance, that our vector technology has broad applicability in the field of 

gene medicine. This can be attributed to the following properties of our construct:  

• 

• 

• 

• 

the viral promoters are inactivated;  

insertional gene activation is prevented – a major safety factor;  

chromosomal integration and;  

nuclear localization.  

8

In summary, we have developed proprietary technologies in the areas of cell signaling, immune modulation and 
gene regulation (genetic antisense or antisense RNA) that we are using as platforms for a portfolio of novel therapeutics. 
There can be no assurance that we will be able to secure patents or that these programs will be successful. The potential 
therapeutics we are developing could be used, if successful, for the treatment of a variety of diseases, including 
osteoporosis, osteonecrosis and other bone pathologies, diabetes, autoimmune uveitis, and inflammatory bowel disease, 
including Crohn’s Disease and ulcerative colitis, among others.  

We have developed an immunomodulator agent EGS21 as a potential therapeutic for treating immune mediated 

disorders. EGS 21 is a glycolid that has been shown by our scientists and collaborators to act as an anti-inflammatory 
agent in animal model systems and is being evaluated as a drug candidate in the treatment of various immune mediated 
diseases.  

In summary, we have developed proprietary technologies in the areas of cell signaling, immune modulation and 

gene regulation (genetic antisense RNA) that we are using as platforms for a portfolio of novel therapeutics.  

There can be no assurance that we will be able to secure patents or that these programs will be successful. The 

potential therapies we are developing could be used, if successful for the treatment of a variety of diseases, including 
osteoporosis, osteonecrosis and other bone pathologies, diabetes, autoimmune uveitis and inflammatory bowel disease, 
including Crohn’s disease and ulcerative colitis, among others.  

Products and Services  

We are applying our core technologies to develop novel therapeutics as well as research tools for the life 

sciences and clinical diagnostics markets. In addition, we provide clinical laboratory services to physicians and other 
health care providers in the New York, New Jersey and Eastern Pennsylvania medical communities.  

Research Products  

We are organized to lead in the development, production, marketing and sales of innovative life science research 

reagents worldwide based on over 30 years of experience in building strong international market recognition, 
implementing outstanding operational capabilities, through two main channels to market.  

Enzo Life Sciences – “Enabling Discovery in Life Sciences” 

Enzo Life Sciences is a positioned as a leading manufacturer and supplier of high quality 
reagents, kits and products supplied to scientific researchers in academia, clinical research and 
drug discovery. With direct sales operations in US, Switzerland, Germany, UK, France and 
Benelux, Enzo Life Sciences also supports its 9,000 products through a global network of 
dedicated distributors.  

Axxora.com – the “Innovative Research Reagents Marketplace” 

Axxora.com is a proven distribution platform for original manufacturers of innovative research 
reagents. An increasing number of researchers use our unique marketplace to instantly connect 
with over 40 specialty manufacturers and gain access to over 30,000 products. Purchasing 
groups from universities, research institutes, biotech and pharmaceutical companies utilize this 
extensive catalog to source research reagents and conveniently consolidate orders. 

9

The products supplied by Enzo Life Sciences include small molecules, proteins, antibodies, peptides, assay kits 

and custom services. Our comprehensive portfolio of high quality reagents and kits in key research areas are sold to 
scientific experts in the following fields:  

Adipokines 
Antibiotics 
Apotosis/Cell Death 
Biologically Active Peptides 
Bone Metabolism 
Cancer Research 
Cell Death 
Cell Cycle 
Chemokines/Cytokines 
Cytoskeletal Research 
Dependence Receptors 
DNA Fragmentation/Damage/Repair 
DNA Regulation 
Epigenetics 
FISH 
Growth Factors/Cytokines 
Hypoxia 
Immunology 
Inflammation/Innate Immunity 

Interferons 
In Vitro Toxicology 
Kinases/Inhibitors 
Leukotrienes/Prostaglandins/Thromboxanes 
Microarray Labeling 
Multidrug Resistance 
Natural Products/Antibiotics 
Neuroscience 
Nitric Oxide Pathway 
Nuclear Receptors 
Oxidative Stress 
Protein Aggregation 
Proteosome/Ubiquitin 
Receptors 
Signal Transduction 
Stem Cell/Cell Differentiation 
Stress Proteins/Heat Shock Proteins 
TNF/TNF Receptor Superfamily 
Transcription Factors 
Viral Signaling 

Enzo Life Sciences is organized to promote and market its products and brands under its own name, building on 

a foundation of the brands it has acquired or developed previously.  

Enzo The original Enzo brand products and technologies are primarily focused in the areas of microarray 
analysis, gene regulation and gene modification. Patented Enzo technologies and products are recognized as key tools in 
non-radioactive gene and protein labeling.  

Alexis The Alexis brand provides recognition in producing and commercializing innovative high quality reagents 

and as an established source for a comprehensive panel of products in many key research areas including the fields of 
cell death, nitric oxide, and obesity/adipogenesis.  

Biomol International The Biomol International brand provides global recognition in the cellular biochemistry 

segment with an emphasis on areas related to protein post-translational modification, be it by ubiquitin or the ubiquitin-like 
proteins, acetylation, methylation, phosphorylation, sulphation, or glycolsylation.  

Assay Designs The Assay Designs brand emphasizes our immunoassay development capability in the fields of 

inflammation, steroids and hormones, and cell signaling.  

Stressgen The Stressgen brand is focused exclusively on the fields of the heat shock and cell stress.  

Enzo Life Sciences through its new product development programs is now entering new markets in the fields of Cellular 
Analysis and Protein Aggregation detection. As part of this introduction, we are establishing new product lines to increase 
recognition of our products, such as the Cellestial® range of fluorescent dyes and kits, and ProteoStat® protein 
aggregation detection line of products.  

Therapeutic Development Programs  

We have a number of therapeutic products in various stages of development that are based on our proprietary 

cell signaling, immune regulation and gene therapy technologies. Our therapeutic programs are described below.  

Autoimmune Uveitis. Autoimmune uveitis, which results from inflammation of a part of the eye known as the 

uvea, is believed to result from an immune reaction to antigens in the eye, specifically the S-antigen and the 
interphotoreceptor retinoid-binding protein (IRBP).  

There is no known cure for uveitis, which in the United States, according to the American Uveitis Society, is newly 

diagnosed in approximately 38,000 people every year.  

10

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
While there are steps that can be taken to preserve sight and slow the progress of vision loss, individuals with 

uveitis also are at increased risk of developing cataracts, glaucoma or retinal detachment.  

In 2005, we acquired rights and intellectual property to a candidate drug and technology intended for use in the 

treatment of uveitis. The drug is the result of a discovery by scientists at the eye clinic of the Ludwig Maximilians 
University in Munich, Germany, who found a small peptide that when fed to rats with experimental allergic uveitis 
promoted their recovery. Based on favorable preclinical studies, the developers conducted an open, pilot Phase I clinical 
trial in Germany with encouraging results.  

In September of 2009, we entered into a Cooperative Research and Development Agreement (CRADA) with the 

National Eye Institute, part of the National Institute of Health (“NIH”), for further study of our candidate compound 
Optiquel™ for the treatment of autoimmune uveitis. In October 2010, we announced the initiation of a human clinical trial 
to be conducted at the NIH. Under the terms of the CRADA, the NIH and Enzo will share the development costs of the 
studies and Enzo will supply its proprietary compound, Optiquel™. The clinical trial will be conducted to assess the safety 
and efficacy of Optiquel™ in a proof-of-concept clinical trial designed as a randomized, double-masked, placebo-
controlled study with a long-term follow-up. The agreement additionally includes non clinical research focusing on the use 
of various compounds that may serve to enhance the immune mediated oral tolerance response to specific antigens. 
Such research may be applicable across the entire spectrum of the Company’s immune regulation platform.  

We previously had filed with the regulatory authorities in Europe, and Optiquel™ has been granted orphan status 

under European regulations. We may apply for the same in the U.S. since Orphan status designation can confer both 
financial and marketing benefits.  

Inflammatory bowel diseases. We believe our immune regulation technology may be used to treat inflammatory 

bowel disease (IBD), including ulcerative colitis and Crohn’s Disease. According to the Crohn’s and Colitis Foundation, 
approximately one million persons in the United States suffer from IBD. Although the cause of these disorders remains 
unknown, various features suggest immune system involvement in their pathogenesis.  

Patients are managed during short-term episodes through the use of anti-inflammatory medications, or 

immunosuppressants, which provide symptomatic relief over short periods of time, but do not provide a cure. These drugs 
are all based on a generalized suppression of the immune response and are non-specific. As such, they have 
considerable side effects and may make the body more prone to infection, lymphoma, or other diseases.  

Alequel™ is an individualized protein product mixture produced from autologous tissue and extracted during a 

routine colonoscopy from a patient. The Enzo protein extract is administered to the patient orally. Interim results of a 
Phase II clinical study were presented at the 2007 annual Digestive Disease Week conference. In these studies, subjects 
were evaluated using the Crohn’s Disease Activity Index (CDAI), a standard measure of the severity of the disease, with 
higher scores indicating more severe disease activity. Forty-nine patients with moderate to severe Crohn’s disease were 
randomized to receive either placebo or Alequel™ Patients were monitored on an intent-to-treat basis for remission (a 
decrease in CDAI to 150 or lower), clinical response (a decrease in CDAI of 100 or greater) and quality of life as 
measured by the inflammatory bowel disease questionnaire (IBDQ). The results, although not statistically significant, 
indicated that patients receiving Alequel™ achieved improved rates of clinical remission compared with the placebo group 
(39% vs. 22%), clinical response (50% vs. 30%) and improved quality of life in the drug study group compared to placebo.  

No treatment-related adverse events were noted. Thus, we concluded that Alequel™ may be a safe and effective 

method for treatment of patients with moderate to severe Crohn’s disease.  

An expanded double-blind, placebo-controlled study to broaden the diversity of the patient population was 

completed at Hadassah Hospital in Jerusalem. The data was presented at the 2009 annual Digestive Disease Week 
conference. The study met its primary and secondary endpoints.  

Osteoporosis (and certain bone disorders) and Diabetes  

We have a number of new compounds in preclinical development that could provide therapy for treating bone 

disorders including osteoporosis, bone loss, fractures, abnormalities, diseases, and other applications. These candidate 
compounds were identified through an innovative approach, combining structural biology, computational screening, 
mutational analyses and biological in vitro assays, followed by validation in animal model systems.  

Enzo-D58 is one of several compounds found to induce new bone formation in mouse calvaria when injected 

subcutaneously. When delivered orally the candidate compound was shown to prevent alveolar bone loss in a 
periodontitis-induced rat model.  

11

One of the most challenging problems in clinical dentistry chronicled throughout history is the loss of alveolar 

bone. Alveolar bone loss is characterized by the reduction in height and volume of the maxillary and mandibular bones 
that underlie and support the teeth. The primary causes of alveolar bone loss are periodontitis and tooth loss, although 
osteoporosis may also contribute. The lack of an effective treatment for periodontal bone loss has encouraged the 
continued search for a successful therapeutic approach. Our preliminary results which were presented at the annual 
meeting of the American Society for Bone and Mineral Research 2007 suggest that Enzo-D58 may be effective in 
preventing alveolar bone loss. We have continued this effort and have synthesized and developed novel compounds that 
appear to be active in standard animal models which assess bone density. We continue to develop these drug candidates 
and progress them along the drug development continuum.  

In addition, we and our collaborators have investigated the biochemical pathways involved in glucose 
homeostasis. Using animal genetic models, and structural and computational biology we have been able to decipher 
some of the complex cellular machinery that controls glucose, synthesize novel entities that interact at key targets and 
test them in standard animal models of diabetes. We continue to explore this very exciting line of research and continue 
activities geared toward the development of potential therapeutics for diabetes with novel mechanisms of action.  

Non-Alcoholic SteatoHepatitis (NASH)

We have completed a double-blind, placebo-controlled study at Hadassah Hospital in Jerusalem designed to 

investigate the effects of EGS-21, a glycolipid, as an immune modulator for the alleviation of NASH. We presented results 
at the 2009 American Association for Liver Disease Meeting. The study concluded that oral administration of EGS21 
appears to be safe and biologically active in patients with insulin resistance and NASH, leading to decreased hepatic 
steatosis, and improved insulin resistance.  

Human Immunodeficiency Virus (HIV-1)  

Based on Phase I trial results demonstrating long-term survival and functioning of antisense RNA in white blood 

cells, including CD4+ cells, we initiated a Phase I/II study at University of California San Francisco (UCSF), the site of the 
Phase I study. This study focuses on a strategy designed to increase the percentage of engineered CD4+ cells that 
contain the anti-HIV-1 antisense genes. The first patient has undergone treatment and we are continuing to monitor the 
progress. We have no plans at the present time to expand this trial.  

Clinical Laboratory Services  

We operate a regional clinical laboratory that offers extensive diagnostic services to the New York, New Jersey 
and Eastern Pennsylvania medical communities. Our clinical laboratory testing is utilized by physicians as an essential 
element in the delivery of healthcare services. Physicians use laboratory tests to assist in the detection, diagnoses, 
evaluation, monitoring and treatment of diseases and other medical conditions. Clinical laboratory testing is generally 
categorized as clinical testing and anatomic pathology testing. Clinical testing is performed on body fluids, such as blood 
and urine. Anatomic pathology testing is performed on tissues and other samples, such as human cells. Most clinical 
laboratory tests are considered routine and can be performed by most commercial clinical laboratories. Tests that are not 
routine and that require more sophisticated equipment and highly skilled personnel are considered esoteric tests and may 
be performed less frequently than routine tests. 

We offer a comprehensive menu of routine and esoteric clinical laboratory tests or procedures. These tests are 

frequently used in general patient care by physicians to establish or support a diagnosis, to monitor treatment or 
medication levels, or search for an otherwise undiagnosed condition.  

Our full service clinical laboratory in Farmingdale, NY contains infrastructure that includes comprehensive 

information technology applications, logistics, client service and billing departments. Also, we have a network of 
approximately thirty strategically located patient service centers and a full service phlebotomy department. Patient service 
centers collect the specimens as requested by physicians. We also operate a fully equipped STAT laboratory in New York 
City. A “STAT” lab is a laboratory that has the ability to perform certain routine tests quickly and report results to the 
physician immediately.  

Patient specimens are delivered to our laboratory facilities primarily by our logistics department accompanied by a 

test requisition form. These forms, which are completed by the ordering physician, indicate the tests to be performed and 
demographic patient information in most instances utilizing EnzoDirect™, our proprietary computer-based ordering and 
results delivery system. Once the information is entered into the laboratory computer system the tests are performed on 
certain laboratory testing equipment and the results are delivered primarily through an interface from the laboratory testing 
equipment or in some instances, manually into the laboratory computer system. Most routine testing is completed by early 
the next morning, and test results are reported to the ordering physician.  

12

These test results are either reported electronically via our EnzoDirect™ system or delivered by our logistics 

department directly to the ordering physicians’ offices. Physicians who request that they be called with a particular result 
are so notified by our customer service personnel.  

For fiscal years ended July 31, 2010, 2009 and 2008, respectively, 46%, 44% and 54% of the Company’s 
revenues were derived from the clinical laboratory. At July 31, 2010 and 2009, respectively, approximately 45% and 40%, 
of the Company’s net accounts receivable were derived from its clinical laboratory business. The Company believes that 
the concentration of credit risk with respect to the Clinical Labs accounts receivable is mitigated by the diversity of its 
numerous third party payers and individual patient accounts, and is limited to certain large payers that insure individuals 
that utilize the Clinical Labs services. To reduce risk, the Company routinely assesses the financial strength of these 
payers and, consequently, believes that its accounts receivable credit risk exposure, with respect to these payers, is 
limited. While the Company also has receivables due from the Federal Medicare program, the Company does not believe 
that these receivables represent a credit risk since the Medicare program is funded by the federal government and 
payment is primarily dependent on our submitting the appropriate documentation. 

Revenues, net of contractual adjustment, from direct billings under the Federal Medicare program during the 

years ended July 31, 2010, 2009 and 2008 were approximately 25%, 23% and 22%, respectively, of the clinical laboratory 
segment’s total revenue. We estimate contractual adjustment based on significant assumptions and judgments, such as 
the interpretation of payer reimbursement policies which bears the risk of change. The estimation process is based on the 
experience of amounts approved as reimbursable and ultimately settled by payers, versus the corresponding gross 
amount billed to the respective payers. The contractual adjustment is an estimate that reduces gross revenue, based on 
gross billing rates, to amounts expected to be approved and reimbursed. Gross billings are based on a standard fee 
schedule we set for all third party payers, including Medicare, health maintenance organizations (“HMO’s) and managed 
care providers. We adjust the contractual adjustment estimate quarterly, based on our evaluation of current and historical 
settlement experience with payers, industry reimbursement trends, and other relevant factors. The other relevant factors 
that affect our contractual adjustment include the monthly and quarterly review of: 1) current gross billings and receivables 
and reimbursement by payer, 2) current changes in third party arrangements. 3) the growth of in-network provider 
arrangements and managed care plans specific to our Company. The clinical laboratory industry is characterized by a 
significant amount of uncollectible accounts receivable related to the inability to receive accurate and timely billing 
information in order to forward it on to the third party payers for reimbursement, and the inaccurate information received 
from the covered individual patients for unreimbursed unpaid amounts. Our provision for uncollectible accounts receivable 
is within historical expectations.  

Other than the Medicare program, revenues from United Healthcare of New York, Inc. represented 25%, 25% and 

26% of the Clinical Labs segment’s net revenue for the fiscal year ended July 31, 2010, 2009 and 2008, respectively. 
Billing for laboratory services is complicated. Depending on the billing arrangement and applicable law, we must bill 
various payers, such as patients, insurance companies and the Federal Medicare Program, all of which have different 
requirements. In both New York and New Jersey, the law prohibits the Company from billing the ordering physician. 
Compliance with applicable laws and regulations as well as, internal compliance policies and procedures adds further 
complexity to the billing process. We depend on the ordering physician to provide timely, accurate billing demographic 
and diagnostic coding information to us. Additional factors complicating the billing process include:  

• 

• 

• 

pricing differences between our standard gross fee schedules and the reimbursement rates of the payers;  

disputes with payers as to which party is responsible for payment and;  

disparity in coverage and information requirements among various payers. 

We believe that most of our bad debt expense is primarily the result of inaccurate billing information on 
requisitions received from the ordering physician. In addition, the bad debts includes the balances, after receipt of the 
approved settlements from third party payers for the insufficient diagnosis information received from the ordering 
physician, which result in denials of payment and the uncollectible portion of receivables from self payers, including 
deductibles and copayments, which are subject to credit risk and patients’ ability to pay. We perform the requested tests 
and report test results regardless of whether the billing or diagnostic coding information is inaccurate or missing. We 
subsequently attempt to contact the ordering physician to obtain and rectify incorrect billing information.

Missing or inaccurate information on the requisitions adds complexity to and may slow the billing process, creates 
backlogs of unbilled requisitions, and generally increases the collectability and the aging of accounts receivable. When all 
issues relating to the missing or inaccurate information are not resolved in a timely manner, the related receivables are 
fully reserved to the allowance for doubtful accounts or written off.  

We incur significant additional costs as a result of our participation in Medicare, as billing and reimbursement for 

clinical laboratory testing is subject to considerable and complex federal and state regulations.  

13

These additional costs include those related to: (1) complexity added to our billing processes; (2) training and 

education of our employees and customers; (3) compliance and legal costs; and (4) costs related to, among other factors, 
medical necessity denials and advance beneficiary notices. The Centers for Medicare & Medicaid Services, or CMS 
(formerly the Health Care Financing Administration), establishes procedures and continuously evaluates and implements 
changes in the reimbursement process.  

The permitted Medicare reimbursement rate for clinical laboratory services has been reduced by the Federal 

government in a number of instances over the past several years. In March 2010, U.S. federal legislation was enacted to 
reform healthcare. The legislation provides for reductions in the Medicare clinical laboratory fee schedule of 1.9% for five 
years beginning in 2010 and also includes a productivity adjustment which reduces the Consumer Price Index (“CPI”) 
market basket update beginning in 2011. In 2010, approximately 25% of our Clinical Lab’s segment revenues were 
reimbursed by Medicare under the clinical laboratory fee schedule. The legislation imposes an excise tax on the seller for 
the sale of certain medical devices in the United States, including those purchased and used by laboratories, beginning in 
2013. The legislation establishes the Independent Payment Advisory Board, which will be responsible, beginning in 2014, 
annually to submit proposals aimed at reducing Medicare cost growth while preserving quality. These proposals 
automatically will be implemented unless Congress enacts alternative proposals that achieve the same savings targets. 
We could experience a significant decrease in revenue from Medicare as a result of this legislation, which could have a 
material adverse effect on us.  

Research and Development  

Our principal research and development efforts are directed toward expanding our research product lines, given 
our increased manufacturing, distribution capability following the acquisitions of Axxora, Biomol International, and Assay 
Designs, as well as developing innovative new clinical diagnostic and therapeutic platforms. We have developed our core 
research expertise in the life science field as a result of over 30 years of dedicated focus in this area. We conduct our 
research and other product development efforts through internal research and collaborative relationships.  

In the fiscal years ended July 31, 2010, 2009 and 2008, the Company incurred costs of approximately 

$9,704,000, $9,220,000 and $8,637,000, respectively, for research and development activities.  

Internal Research Programs  

Our professional staff of 82 scientists, including 76 with post graduate degrees, performs our internal research 

and development activities. Our product development programs incorporate various scientific areas of expertise, including 
recombinant DNA, monoclonal antibody development, enzymology, microbiology, biochemistry, molecular biology, 
organic chemistry, and fermentation. In addition, we continuously review in-licensing opportunities in connection with new 
technology.  

External Research Collaborations  

We have and continue to explore large numbers of collaborative relationships with prominent companies and 

leading-edge research institutions in order to maximize the application of our technology in areas where we believe such 
relationship will benefit the development of our technology. We also have a number of external collaborations around the 
world to enhance our ongoing therapeutic development program.  

Sales and Marketing  

Our sales and marketing strategy for Enzo Life Sciences is to sell our life science products through: (i) direct sales 

to end-users under the Enzo Life Sciences name, with direct recognition to our acquired brands (ii) direct sales to end 
users under the Axxora electronic market place name (iii) supply agreements with manufacturers and (iv) through 
distributors in major geographic markets. We operate with an understanding of local markets and a well-functioning 
distribution network system across the globe. Scientists around the world who recognize the brands (Alexis, Assay 
Designs, Biomol, Enzo and Stressgen) now receive products directly from Enzo Life Sciences where we are recognized 
for innovative high quality products, supported directly by our qualified technical staff. We sell the same products through 
our Axxora electronic market place which is also the source for life science research reagents from over 40 original 
manufacturers. Our direct marketing and sales network includes fully-owned subsidiaries (USA, Switzerland, Germany, 
Benelux, and UK), direct presence in France and a network of third party distributors in most other significant markets 
worldwide.  

For Enzo Clinical Labs, we focus our sales efforts on obtaining and retaining profitable accounts. We market the 
clinical laboratory services to ordering physicians in the metro New York, New Jersey and Eastern Pennsylvania region 
through our direct sales force who are supported by customer service and patient service representatives. We monitor 
and where appropriate, we change the service levels and terminate ordering physician accounts that are not profitable. 
We are focusing our efforts to attract and retain clients who participate with the providers with whom we have regional 
contracts and adding clinical tests to our service menu to assist sales in new account penetration.  

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Distribution Arrangements  

We also distribute our life science products internationally through a network of distributors. Through these 

arrangements, we are able to leverage the established marketing and distribution infrastructure of these companies.  

Competition

We compete with other life science and biotechnology companies, as well as pharmaceutical, chemical and other 
companies. Competition in our industry is intense. Many of these companies are performing research targeting the same 
technology, applications and markets. Some of these competitors are significantly larger than we are and have more 
resources than we do. The primary competitive factors in our industry are the ability to create scientifically advanced 
technology, offer innovative products at the forefront of technological development to targeted market segments, 
successfully develop and commercialize products on a timely basis, establish and maintain intellectual property rights and 
attract and retain a breadth and depth of human resources.  

Our clinical laboratory services business competes with numerous national, regional, and local entities, some of 
which are larger than we are and have greater financial resources than we do. Our laboratory competes primarily on the 
basis of the quality and specialized nature of its testing, reporting and information services, its reputation in the medical 
community, its reliability and speed in performing diagnostic tests, and its ability to employ qualified laboratory personnel. 

Intellectual Property  

We consider our intellectual property program to be a key asset and a major strategic component to the execution 
of our business strategy. A broad portfolio of issued patents and pending patent applications supports our core technology 
platforms. Our policy is to seek patent protection for our core technology platforms, as well as for ancillary technologies 
that support these platforms and provide a competitive advantage.  

At the end of fiscal 2010 we owned or licensed over 70 patents relating to products, methods and procedures 

resulting from our internal or sponsored research projects.  

There can be no assurance that patents will be issued on pending applications or that any issued patents will not 

be challenged (see Item 3, Legal Proceedings), or that they will have commercial benefit. We do not intend to rely on 
patent protection as the sole basis for protecting our proprietary technology. We also rely on our trade secrets and 
continuing technological innovation. We require each of our employees to sign a confidentiality agreement that prohibits 
the employee from disclosing any confidential information about us, including our technology or trade secrets.  

Our intellectual property portfolio can be divided into patents that provide claims in three primary categories, as 

described below:  

Nucleic Acid Chemistry  

We currently have broad patent coverage in the area of nucleic acid chemistry. We have done extensive work on 

the labeling of nucleic acids for the purpose of generating a signal that dates back over twenty years. Enzo has multiple 
issued patents covering the modification of nucleic acids at their sugar and phosphate sites. The claims contained in 
these patents cover products that incorporate a signaling moiety into a nucleic acid attached to a sugar or phosphate for 
the purpose of nucleic acid detection or quantification, including sequencing and real time nucleic acid amplification. Enzo 
also has patents directed to proprietary dyes that may be used to label the sugar, base or phosphate positions of nucleic 
acids.  

Signal Delivery  

We also have a long history of innovation in the area of analyte detection using non-radioactive signaling entities. 
At the signaling entity itself, there are several Enzo patents that cover the formation of this structure. A patent which was 
allowed in 2006 covers the attachment of signaling molecules through the phosphate moiety of a nucleic acid, which is 
how the signal-generating enzyme is bound.  

Nucleic Acid Analysis Format  

We also have patents with issued claims covering the use of arrays of single-stranded nucleic acids fixed or 
immobilized in hybridizable form to a non-porous solid support. These patents cover any product that uses arrays of 
nucleic acids for molecular analysis.  

In some instances, we may enter into royalty agreements with collaborating research parties in consideration for 

the commercial use by us of the developments of their joint research. In other instances the collaborating party might 
obtain a patent, but we receive the license to use the patented subject matter.  

15

In such cases, we will seek to secure exclusive licenses. In other instances, we might have an obligation to pay 
royalties to, or reach a royalty arrangement with, a third party in consideration of our use of developments of such third 
party.

REGULATION AFFECTING OUR BUSINESSES  

Regulation of Pharmaceutical Products  

New drugs and biological drug products are subject to regulation under the Federal Food, Drug and Cosmetic Act, 
and biological products are also regulated under the Public Health Service Act. We believe that products developed by us 
or our collaborators will be regulated either as biological products or as new drugs. Both statutes and regulations 
promulgated thereunder govern, among other things, the testing, licensing, manufacturing, marketing, distributing, safety, 
and efficacy requirements, labeling, storage, exporting, record keeping, advertising and other promotional practices 
involving biologics or new drugs, as the case may be. FDA review or approval or other clearances must be obtained 
before clinical testing, and before manufacturing and marketing, of biologics and drugs. At the FDA, the Center for 
Biological Evaluation and Research (“CBER”) is responsible for the regulation of biological drugs and the Center for Drug 
Evaluation and Research (“CDER”) is responsible for the regulation of non-biological drugs. Biological drugs are licensed 
and other drugs are approved before commercialization.  

Any therapeutics products that we develop will require regulatory review before clinical trials, and additional 
regulatory clearances before commercialization. New human gene medicine products as well as immune regulation 
products, as therapeutics, are subject to regulation by the FDA and comparable agencies in other countries. The FDA on 
a case-by-case basis currently reviews each protocol. In addition, the National Institutes of Health (“NIH”) is also involved 
in the oversight of gene therapies and the FDA has required compliance with certain NIH requirements.  

Federal requirements are detailed in Title 21 of the Code of Federal Regulations (21 CFR). In addition, the FDA 

publishes guidance documents with respect to the development of therapeutics protocols.  

Obtaining FDA approval has historically been a costly and time-consuming process. Generally, to gain FDA 

approval, a developer first must conduct pre-clinical studies in the laboratory evaluating product chemistry, formulation 
and stability and, if appropriate, in animal model systems, to gain preliminary information on safety and efficacy. Pre-
clinical safety tests must be conducted by laboratories that comply with FDA regulations governing Good Laboratory 
Practices (GLP). The results of those studies are submitted with information characterizing the product and its 
manufacturing process and controls as a part of an investigational new drug (“IND”) application, which the FDA must 
satisfactorily review before human clinical trials of an investigational drug can start. The IND application includes a 
detailed description of the clinical investigations to be undertaken in addition to other pertinent information about the 
product, including descriptions of any previous human experience and the Company’s future plans for studying the drug.  

In order to commercialize any products, we (as the sponsor) file an IND and will be responsible for initiating and 

overseeing the clinical studies to demonstrate the safety and efficacy necessary to obtain FDA marketing approval of any 
such products. For INDs that we sponsor, we will be required to select qualified clinical sites (usually physicians affiliated 
with medical institutions) to supervise the administration of the investigational product. It is the sponsor’s responsibility to
ensure that the investigations are conducted and monitored in accordance with FDA regulations, Good Clinical Practices 
(GCP) and the general investigational plan and protocols contained in the IND. This may be done using in-house trained 
personnel or an outside contract research organization (CRO).  

Each clinical study is reviewed and approved by an Institutional Review Board (IRB). The IRB will consider, 
among other things, ethical factors and the safety of human subjects. Clinical trials are normally conducted in three 
phases, although the phases might overlap. Phase I trials, concerned primarily with the safety and tolerance of the drug, 
and its pharmacokinetics (or how it behaves in the body including its absorption and distribution) involve fewer than 100 
subjects. Phase II trials normally involve a few hundred patients and are designed primarily to demonstrate preliminary 
effectiveness and the most suitable dose or exposure level for treating or diagnosing the disease or condition for which 
the drug is intended, although short-term side effects and risks in people whose health is impaired may also be examined. 
Phase III trials are expanded, adequate and well-controlled clinical trials with larger numbers of patients and are intended 
to gather the additional information for proper dosage and labeling of the drug. Clinical trials generally take two to five 
years, but the period may vary. Certain regulations promulgated by the FDA may shorten the time periods and reduce the 
number of patients required to be tested in the case of certain life-threatening diseases, which lack available alternative 
treatments.  

The FDA receives reports on the progress of each phase of clinical testing, and it may require the modification, 

suspension or termination of clinical trials if an unwarranted risk is presented to patients. Human gene medicine products 
are a new category of therapeutics.  

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There can be no assurance regarding the length of the clinical trial period, the number of patients that the FDA 

will require to be enrolled in the clinical trials in order to establish the safety, purity and potency of human gene medicine 
products, or that the clinical and other data generated will be acceptable to the FDA to support marketing approval.  

After completion of clinical trials of a new product, FDA marketing approval must be obtained before the product 

can be sold in the United States. If the product is regulated as a new biologic, CBER requires the submission and 
approval of a Biologics License Application (BLA) before commercial marketing of the biologic product. If the product is 
classified as a new drug, we must file a New Drug Application (“NDA”) with CDER and receive approval before 
commercial marketing of the drug. The NDA or BLA must include results of product development, pre-clinical studies and 
clinical trials. The testing and approval processes require substantial time and effort and there can be no assurance that 
any approval will be granted on a timely basis, if at all. The median time to obtain new product approvals after submission 
to the FDA is approximately 12 months. If questions arise during the FDA review process, approval can take longer. 
Before completing its review, the FDA may seek guidance from an Advisory Panel of outside experts at a public or closed 
meeting. While the advice of these committees is not binding on the FDA, it is often followed. Notwithstanding the 
submission of relevant data, the FDA might ultimately decide that the NDA or BLA does not satisfy its regulatory criteria 
for approval and, thus, reject the application, refuse to approve it, or require additional clinical, preclinical or chemistry 
studies. Even after FDA regulatory approval or licensure, a marketed drug product is subject to continual review by the 
FDA.

In addition, if previously unknown problems are discovered or we fail to comply with the applicable regulatory 
requirements, we might be restricted from marketing a product, we might be required to withdraw the product from the 
market, and we might possibly become subject to seizures, injunctions, voluntary recalls, or civil, monetary or criminal 
sanctions. In addition, the FDA may condition marketing approval on the conduct of specific post-marketing studies to 
further evaluate safety and effectiveness.  

For commercialization of our biological or other drug products, the manufacturing processes described in our NDA 

or BLA must receive FDA approval and the manufacturing facility must successfully pass an inspection prior to approval 
or licensure of the product for sale within the United States. The pre-approval inspection assesses whether, for example, 
the facility complies with the FDA’s current good manufacturing practices (cGMP) regulations. These regulations 
elaborate testing, control, documentation, personnel, record keeping and other quality assurance procedure requirements 
that must be met. Once the FDA approves our biological or other drug products for marketing, we must continue to 
comply with the cGMP regulations. The FDA periodically inspects biological and other drug manufacturing facilities to 
ensure compliance with applicable cGMP requirements. Failure to comply with the statutory and regulatory requirements 
subjects the manufacturer to possible legal or regulatory action, such as suspension of manufacturing, seizure of product 
or voluntary recall of a product.  

If a developer obtains designation by the FDA of a biologic or other drug as an “orphan” for a particular use, the 

developer may request grants from the federal government to defray the costs of qualified testing expenses in connection 
with the development of such drug. Orphan drug designation is possible for drugs for rare diseases, including many 
genetic diseases, which means the drug is for a disease that has a prevalence of less than 200,000 patients in the United 
States. The first applicant who receives an orphan drug designation and who obtains approval of a marketing application 
for such drug acquires the exclusive marketing rights to that drug for that use for a period of seven years unless the 
subsequent drug can be shown to be clinically superior. Accordingly, no other company would be allowed to market an 
identical orphan drug with the same active ingredient for the use approved by the FDA for seven years after the approval.  

Regulation of Diagnostics  

The diagnostic products that are developed by our collaborators, or by us, are likely to be regulated by the FDA 
as medical devices. Unless an exemption applies, medical devices must receive either “510(k) clearance” or pre-market 
approval (“PMA”) from the FDA before marketing them in the United States. The FDA’s 510(k) clearance process usually 
takes from four to twelve months, but it can last longer. The process of obtaining PMA approval is much more costly, 
lengthy and uncertain. It generally takes from one to three years or even longer. We cannot be sure that 510(k) clearance 
or PMA approval will ever be obtained for any product we propose to market.  

The FDA decides whether a device must undergo either the 510(k) clearance or PMA approval process based 

upon statutory criteria. These criteria include the level of risk that the agency perceives is associated with the device and 
a determination whether the product is a type of device that is similar to devices that are already legally marketed. 
Devices deemed to pose relatively less risk are placed in either class I or II, which requires the manufacturer to submit a 
premarket notification requesting 510(k) clearance, unless an exemption applies. The pre-market notification must 
demonstrate that the proposed device is “substantially equivalent” in intended use and in safety and effectiveness to a 
legally marketed “predicate device” that is either in class I, class II, or is a “pre-amendment” class III device (i.e., one that
was in commercial distribution before May 28, 1976) for which the FDA has not yet called for submission of a PMA 
application.  

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After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, 

or that would constitute a major change in its intended use, requires a new 510(k) clearance or could require a PMA 
approval. The FDA requires each manufacturer to make this determination in the first instance, but the FDA can review 
any such decision. If the FDA disagrees with a manufacturer’s decision not to seek a new 510(k) clearance, the agency 
may retroactively require the manufacturer to seek 510(k) clearance or PMA approval. The FDA also can require the 
manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or PMA approval is obtained.  

Devices deemed by the FDA to pose the greatest risk, such as life-sustaining, life-supporting or implantable 

devices, or deemed not substantially equivalent to a legally marketed class I or class II predicate device, or to a 
preamendment class III device, for which PMAs have not been called, are placed in class III. Such devices are required to 
undergo the PMA approval process in which the manufacturer must prove the safety and effectiveness of the device to 
the FDA’s satisfaction. A PMA application must provide extensive preclinical and clinical trial data and also information 
about the device and its components regarding, among other things, device design, manufacturing and labeling. After 
approval of a PMA, a new PMA or PMA supplement is required in the event of a modification to the device, it’s labeling or 
its manufacturing process.  

Although clinical investigations of most devices are subject to the investigational device exemption (“IDE”) 

requirements, clinical investigations of in vitro diagnostic (“IVDs”) tests are exempt from the IDE requirements, including 
the need to obtain the FDA’s prior approval, provided the testing is noninvasive, does not require an invasive sampling 
procedure that presents a significant risk, does not introduce energy into the subject, and is not used as a diagnostic 
procedure without confirmation by another medically established test or procedure. In addition, the IVD must be labeled 
for Research Use Only (RUO) or Investigational Use Only (IUO), and distribution controls must be established to assure 
that IVDs distributed for research or investigation are used only for those purposes. The FDA expressed its intent to 
exercise heightened enforcement with respect to IUO and RUO devices improperly commercialized prior to receipt of FDA 
clearance or approval.  

We have developed products that we currently distribute in the United States on a RUO basis. There can be no 
assurance that the FDA would agree that our distribution of these products meets the requirements for RUO distribution. 
Furthermore, failure by us or recipients of our RUO products to comply with the regulatory limitations on the distribution 
and use of such devices could result in enforcement action by the FDA, including the imposition of restrictions on our 
distribution of these products.  

Any devices that we manufacture or distribute will be subject to a host of regulatory requirements, including the 

Quality System Regulation (which requires manufacturers to follow elaborate design, testing, control, documentation and 
other quality assurance procedures), the Medical Device Reporting regulation (which requires that manufacturers report to 
the FDA certain types of adverse events involving their products), labeling regulations, and the FDA’s general prohibition 
against promoting products for unapproved or “off label” uses. Class II devices also can have special controls such as 
performance standards, post market surveillance, patient registries, and FDA guidelines that do not apply to class I 
devices. Unanticipated changes in existing regulatory requirements or adoption of new requirements could hurt our 
business, financial condition and results of operations.  

We are subject to inspection and market surveillance by the FDA to determine compliance with regulatory 

requirements. If the FDA finds that we have failed to comply, the agency can institute a wide variety of enforcement 
actions, ranging from a public warning letter to more severe sanctions such as fines, injunction, civil penalties, recall or 
seizure of our products, the issuance of public notices or warnings, operating restrictions, partial suspension or total 
shutdown of production, refusal of our requests for 510(k) clearance or PMA approval of new products, withdrawal of 
510(k) clearance or PMA approvals already granted, and criminal prosecution.  

The FDA also has the authority to request repair, replacement or refund of the cost of any medical device 
manufactured or distributed by us. Our failure to comply with applicable requirements could lead to an enforcement action 
that may have an adverse effect on our financial condition and results of operations.  

Unanticipated changes in existing regulatory requirements, our failure to comply with such requirements or 

adoption of new requirements could have a material adverse effect on us.  

We have employees to expedite the preparation and filing of documentation necessary for FDA clearances and 

approvals, patent issuances and licensing agreements.  

We cannot assure you that future clinical diagnostic products developed by us or our collaborators will not be 

required to be reviewed by FDA under the more expensive and time consuming pre-market approval process.

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Clinical Laboratory Regulations  

The clinical laboratory industry is subject to significant federal and state regulation, including inspections and 

audits by governmental agencies. Governmental authorities may impose fines or criminal penalties or take other actions 
to enforce laws and regulations, including revoking a clinical laboratory’s federal certification to operate a clinical 
laboratory. Changes in regulation may increase the costs of performing clinical laboratory tests, increase the 
administrative requirements of claims or decrease the amount of reimbursement. Our clinical laboratory and (where 
applicable) patient service centers are licensed and accredited by the appropriate federal and state agencies. CLIA (The 
Clinical Laboratory Improvement Act of 1967, and the Clinical Laboratory Improvement Amendments of 1988) regulates 
virtually all clinical laboratories by requiring that they be certified by the federal government and comply with various 
operational, personnel and quality requirements intended to ensure that their clinical laboratory testing services are 
accurate, reliable and timely. CLIA does not preempt state laws that are more stringent than federal laws. Many clinical 
laboratories must meet other governmental standards, undergo proficiency testing, and are subject to inspection. Clinical 
laboratory certificates or licenses are also required by various state and local laws.  

CLIA places all tests into one of three categories of complexity (waived, moderate complexity and high 

complexity) and establishes varying requirements depending upon the complexity category of the test performed. A 
laboratory that performs high complexity tests must meet more stringent requirements than a laboratory that performs only 
moderate complexity tests, while those that perform only waived tests may apply for a certificate of waiver from most of 
the requirements of CLIA. Our facility is certified to perform highly complex tests. In general, the Secretary of Health and 
Human Services (“HHS”) regulations require laboratories that perform high or moderate complexity tests to implement 
systems that ensure the accurate performance and reporting of test results, establish quality control and quality assurance 
systems ensure hiring of personnel that meet specified standards, engage in proficiency testing by approved agencies 
and undergo biennial inspections.  

Clinical laboratories also are subject to state regulation. CLIA provides that a state may adopt different or more 
stringent regulations than Federal law, and permits states to apply for exemption from CLIA if HHS determines that the 
state’s laboratory laws are equivalent to, or more stringent than, CLIA. The State of New York’s clinical laboratory 
regulations contain provisions that are more stringent than Federal law, and New York has received exemption from CLIA.  

Therefore, as long as New York maintains its CLIA-exempt status, laboratories in New York, including our 
laboratory, are regulated under New York law rather than CLIA. Our laboratory is licensed in New York and has continuing 
programs to ensure that its operations meet all applicable regulatory requirements.  

The sanction for failure to comply with these regulations may be suspension, revocation, or limitation of a 
laboratory’s CLIA certificate necessary to conduct business, significant fines and criminal penalties. The loss of, or 
adverse action against, a license, the imposition of a fine, or future changes in Federal, state and local laboratory laws 
and regulations (or in the interpretation of current laws and regulations) could have a material adverse effect on our 
business.  

Billing and reimbursement for clinical laboratory testing is subject to significant and complex federal and state 

regulation. Penalties for violations of laws relating to billing federal healthcare programs and for violations of federal fraud
and abuse laws include: (1) exclusion from participation in Medicare/Medicaid programs; (2) asset forfeitures; (3) civil and 
criminal fines and penalties; and (4) the loss of various licenses, certificates and authorizations necessary to operate 
some or all of a clinical laboratory’s business. The Company is not aware of any material violations.  

The health care industry has been undergoing significant change because third-party payers, such as Medicare 
(serving primarily patients 65 and older), Medicaid serving primarily indigent patients, health maintenance organizations 
and commercial insurers, have increased their efforts to control the cost, utilization and delivery of health care services. 
To address the problem of increasing health care costs, legislation has been proposed or enacted at both the Federal and 
state levels to regulate health care delivery in general and clinical laboratories in particular. Additional health care reform
efforts are likely to be proposed in the future. In particular, we believe that reductions in reimbursement for Medicare 
services will continue to be implemented from time to time. Reductions in the reimbursement rates of other third-party 
payers, commercial insurer and health maintenance organizations are likely to occur as well. We cannot predict the effect 
that health care reform, if enacted, would have on our business, and there can be no assurance that such reforms, if 
enacted, would not have a material adverse effect on our business and operations.  

Containment of health care costs, including reimbursement for clinical laboratory services, has been a focus of 

ongoing governmental activity. Clinical laboratories must bill Medicare directly for the services provided to Medicare 
beneficiaries and may only collect the amounts permitted under the Medicare Fee Schedule. Reimbursement to clinical 
laboratories under the Medicare Fee Schedule has been steadily declining since its inception.  

Under health care in January 2010, the Medicare Fee Schedule was reduced by 1.9% and future reductions are 

expected to continue (See Item 1A Risk Factors).  

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Furthermore, Medicare has mandated use of the Physicians Current Procedural Terminology (“CPT”) for coding 

of laboratory services which has altered the way we bill these programs for some of our services, thereby reducing the 
reimbursement that we receive.  

In March 1996, HCFA (now, the Center for Medicare and Medicaid Services or CMS) implemented changes in the 
policies used to administer Medicare payments to clinical laboratories for the most frequently performed automated blood 
chemistry profiles. Among other things, the changes established a consistent standard nationwide for the content of the 
automated chemistry profiles. Another change requires laboratories performing certain automated blood chemistry profiles 
to obtain and provide documentation of the medical necessity of tests included in the profiles for each Medicare 
beneficiary. Reimbursements have been reduced as a result of this change. Because a significant portion of our costs is 
fixed, these Medicare reimbursement reductions and changes have a direct adverse effect on our net earnings and cash 
flows.  

Future changes in federal, state and local regulations (or in the interpretation of current regulations) affecting 
governmental reimbursement for clinical laboratory testing could have a material adverse effect on our business. We 
cannot predict, however, whether and what type of legislation will be enacted into law. In addition, reimbursement 
disapprovals by the third party payers, commercial insurers and health maintenance organizations, reductions or delays in 
the establishment of reimbursement rates, and carrier limitations on the insurance coverage of the Company’s services or 
the use of the Company as a service provider could have a negative effect on the Company’s future revenues.  

Anti Fraud and Abuse Laws

Existing Federal laws governing Medicare, as well as state laws, also regulate certain aspects of the relationship 
between healthcare providers, including clinical laboratories and their referral sources such as physicians, hospitals and 
other laboratories. One provision of these laws, known as the “Anti-Kickback Law,” contains extremely broad 
proscriptions. Violation of this provision may result in criminal penalties, exclusion from Medicare, and significant civil 
monetary penalties. Under another Federal law, known as the “Stark” law or “self-referral prohibition,” physicians who 
have an investment or compensation relationship with an entity furnishing clinical laboratory services (including anatomic 
pathology and clinical chemistry services) may not, subject to certain exceptions, refer clinical laboratory testing for 
Medicare patients to that entity.  

Similarly, laboratories may not bill Medicare or Medicaid or any other party for services furnished pursuant to a 
prohibited referral. Violation of these provisions may result in disallowance of Medicare for the affected testing services, 
as well as the imposition of civil monetary penalties. New York State also has laws similar to the Federal Stark and Anti-
Kickback laws.  

The Federal Stark laws, and New York State regulations, have also placed restrictions on the supplies and other 

items that laboratories may provide to their clients. These laws specify that laboratories may only provide clients with 
items or devices that are used solely to collect, transport or store specimens for the laboratory or to communicate results 
or tests. Items such as biopsy needles, snares and reusable needles are specifically prohibited from being supplied by 
laboratories to their clients. These laws represent a significant deviation from practices that previously occurred 
throughout the industry. The Company has put in place procedures to ensure compliance with these laws and restrictions 
and believes that it is in compliance with these laws.  

In February 1997, the OIG released a model compliance plan for laboratories. One key aspect of the model 
compliance plan is an emphasis on the responsibilities of laboratories to notify physicians that Medicare covers only 
medically necessary services. These requirements, and their likely effect on physician test ordering habits, focus on 
chemistry tests, especially routine tests, rather than on anatomic pathology services or the non-automated tests, which 
make up the majority of the Company’s business measured in terms of net revenues. Nevertheless, they potentially could 
affect physicians’ test ordering habits more broadly. The Company is unable to predict whether, or to what extent, these 
developments have had an impact or the utilization of the Company’s services.  

The Company seeks to structure its arrangements with physicians and other customers to be in compliance with 
the Anti-Kickback, Stark and state laws, and to keep up-to-date on developments concerning their application by various 
means, including consultation with legal counsel. In addition, in order to address these various Federal and state laws, the 
Company has developed its own Corporate Compliance Program based upon the OIG model program. The Company’s 
Program focuses on establishing clear standards, training and monitoring of the Company’s billing and coding practices. 
Furthermore, as part of this Program, the Company’s Corporate Compliance team meets on a regular basis to review 
various operations and relationships as well as to adopt policies addressing these issues.  

However, the Company is unable to predict how the laws described above will be applied in the future, and no 
assurances can be given that its arrangements or processes will not become subject to scrutiny under these laws. The 
Company is unaware of any material violations.  

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Confidentiality of Health Information

The Health Insurance Portability and Accountability Act of 1996 (“HIPAA”) was signed into law on August 21, 

1996, and it included “administrative simplification” provisions designed to standardize common electronic transactions in 
health care and to protect the security and privacy of health information. Congress’ purpose in promulgating HIPAA was to 
increase the efficiency of health care transactions while, at the same time, protecting the confidentiality of patient 
information. Regulations have been adopted for electronic transaction, privacy and security standards and include the 
requirement to use a National Provider Identifier in electronic health care transactions. These provisions have very broad 
applicability and they specifically apply to health care providers, which include physicians and clinical laboratories. The 
National Provider Identifier is an identifier that replaced all other identifiers that are currently used for healthcare 
transactions (e.g., UPIN, Medicaid provider numbers; identifiers assigned by commercial insurers).  

The electronic transaction standards regulations created guidelines for certain common health care transactions. 

With certain exceptions, these standards require that when we conduct certain transactions electronically with another 
provider, clearinghouse or health plan we must comply with the standards set forth in the regulations. The regulations 
established standard data content and format for submitting electronic claims and other administrative health transactions. 
All health care providers are able to use the electronic format to bill for their services and all health plans and providers 
are required to accept standard electronic claims, referrals, authorizations, and other transactions. The Company believes 
it is in compliance with these standards.  

The privacy regulations, which have been in effect since 2003, created specific requirements for the use and 

disclosure of protected health information (“PHI”). We are required to maintain numerous policies and procedures in order 
to comply with these requirements. Furthermore, we need to continuously ensure that there are mechanisms to safeguard 
the PHI, which is used or maintained in any format (e.g. oral, written, or electronic). Failure to comply with these 
requirements can result in criminal and civil penalties.  

The security regulations, which were finalized in February 2003 and went into effect in April 2005, require us to 
ensure the confidentiality, integrity and availability of all electronic protected health information (“EPHI”) that we create, 
receive, maintain, or transmit. We have some flexibility to fashion our own security measures to accomplish these goals. 
The security regulations strongly emphasize that we must conduct an accurate and thorough assessment of the potential 
risks and vulnerabilities of the confidentiality, integrity and availability of our EPHI and then document our response to the 
various security regulations on the basis of that assessment.  

Complying with the electronic transaction, privacy and security rules requires significant effort and expense for 

virtually all entities that conduct health care transactions electronically and handle patient health information.  

Medical Regulated Waste

We are subject to licensing and regulation under federal, state and local laws relating to the handling and disposal 

of medical specimens, infectious and hazardous waste, as well as to the safety and health of laboratory employees. All 
our laboratories are required to operate in accordance with applicable federal and state laws and regulations relating to 
biohazard disposal of all facilities specimens. We use outside vendors to dispose of such specimens. Although we believe 
that we comply in all respects with such federal, state and local laws, our failure to comply with those laws could subject 
us to denial of the right to conduct business, fines, criminal penalties and/or other enforcement actions.  

Occupational Safety

In addition to its comprehensive regulation of safety in the workplace, the U.S. Federal Occupational Safety and 

Health Administration (“OSHA”) has established extensive requirements relating to workplace safety for health care 
employers, including clinical laboratories, whose workers may be exposed to blood-borne pathogens such as HIV and the 
hepatitis B virus. These regulations, among other things, require work practice controls, protective clothing and 
equipment, training, medical follow-up, vaccinations and other measures designed to minimize exposure to, and 
transmission of, blood-borne pathogens. The Federal Drug Enforcement Administration regulates the use of controlled 
substances in testing for drugs of abuse. We are also subject to OSHA’s requirement that employers using hazardous 
chemicals communicate the properties and hazards presented by those chemicals to their employees. We believe that we 
are in compliance with these OSHA requirements. Our failure to comply with those regulations and requirements could 
subject us to tort liability, civil fines, criminal penalties and/or other enforcement actions.  

21

Other Regulation

Our business is and will continue to be subject to regulation under various state and federal environmental, safety 
and health laws, including the Occupational Safety and Health Act, the Resource Conservation and Recovery Act, and the 
Atomic Energy Act or their state law analogs. These and other laws govern our use, handling and disposal of various 
biological, chemical and radioactive substances used in our operations and wastes generated by our operations. We are 
required to possess licenses under, or are otherwise subject to federal and state regulations pertaining to, the handling 
and disposal of medical specimens, infectious and hazardous waste and radioactive materials.  

We believe that we are in compliance with applicable environmental, safety and health laws in the United States 

and internationally and that our continual compliance with these laws will not have a material adverse effect on our 
business. All of our laboratories are operated in accordance with applicable federal and state laws and regulations relating 
to hazardous substances and wastes, and we use qualified third-party vendors to dispose of biological specimens and 
other hazardous wastes. Although we believe that we comply in all respects with such federal, state and local laws, our 
failure to comply with those laws could subject us to denial of the right to conduct business, civil fines, criminal penalties 
and/or other enforcement actions. Environmental contamination resulting from spills or disposal of hazardous substances 
generated by our operations, even if caused by a third-party contractor or occurring at a remote location could result in 
material liability.

Manufacturing and Research Facilities

Our internal manufacturing, integrated laboratory and scientific efforts for our three segments take place primarily 
at our two adjacent facilities in Farmingdale, New York. A major part of one facility is utilized by Life Science for research 
and manufacturing with special handling capabilities and clean rooms suitable for our operations. In connection with the 
Axxora acquisition, the Life Sciences segment has added logistics operations in Lausen, Switzerland and in San Diego, 
California. In connection with the Biomol International acquisition, the Life Sciences segment added manufacturing and 
research operations in Plymouth Meeting, Pa. and a manufacturing and research facility in Exeter, United Kingdom. In 
connection with the Assay Designs acquisition, the Life Sciences segment added manufacturing and research operations 
in Ann Arbor, Michigan. We also contract with qualified third-party contractors to manufacture our products in cases where 
we deem it appropriate, for example, when it is not cost-effective to produce a product ourselves or where we seek to 
leverage the expertise of another manufacturer in a certain area.  

Employees 

As of July 31, 2010, we employed 527 full-time and 62 part-time employees. Of the full-time employees, 178 were 
engaged in research, development, manufacturing, and marketing of research products, 6 in therapeutics research, 353 in 
performing testing, marketing and billing our clinical laboratories services and 52 in finance, legal, administrative and 
executive functions. Our scientific staff, including 76 individuals with post graduate degrees, possesses a wide range of 
experience and expertise in the areas of recombinant DNA, nucleic acid chemistry, molecular biology and immunology. 
We believe that we have established good relationships with our employees.  

Information Systems 

Information systems are used extensively in virtually all aspects of our businesses. In our clinical laboratory 

business, our information systems are critical with respect to laboratory testing, billing, accounts receivable, customer 
service, logistics, and management of medical data. Our success depends, in part, on the continued and uninterrupted 
performance of our information technology systems. Computer systems are vulnerable to damage from a variety of 
sources, including telecommunications or network failures, malicious human acts and natural disasters.  

Moreover, despite network security measures, some of our servers are potentially vulnerable to physical or 

electronic break-ins, computer viruses and similar disruptive problems. We have invested heavily in the upgrade of our 
information and telecommunications systems to improve the quality, efficiency and security of our businesses. In addition, 
to complement our proprietary physician connectivity solution, EnzoDirect™ we have a web portal version which allows 
physicians to receive laboratory results from any personal computer with a browser and an Internet connection.  

Despite the precautionary measures that we have taken to prevent unanticipated problems that could affect our 

information technology systems, sustained or repeated system failures that interrupt our ability to process test orders, 
deliver test results or perform tests in a timely manner could adversely affect our reputation and result in a loss of 
customers and net revenues.  

22

Quality Assurance 

We consider the quality of our clinical laboratory tests to be of critical importance, and, therefore, we maintain a 

comprehensive quality assurance program designed to help assure accurate and timely test results. In addition to the 
compulsory external inspections and proficiency programs demanded by the Medicare program and other regulatory 
agencies, our clinical laboratory has in place systems to emphasize and monitor quality assurance.  

In addition to our own internal quality control programs, our laboratory participates in numerous externally 

administered, blind quality surveillance programs, including on-site evaluation by the College of American Pathologies 
(“CAP”) proficiency testing program and the New York State survey program. The blind programs supplement all other 
quality assurance procedures and give our management the opportunity to review our technical and service performance 
from the client’s perspective.  

The CAP accreditation program involves both on-site inspections of our laboratory and participation in the CAP’s 

proficiency testing program for all categories in which our laboratory is accredited by the CAP. The CAP is an independent 
nongovernmental organization of board certified pathologists, which offers an accreditation program to which laboratories 
can voluntarily subscribe. A laboratory’s receipt of accreditation by the CAP satisfies the Medicare requirement for 
participation in proficiency testing programs administered by an external source. Our clinical laboratory facilities are 
accredited by the CAP.  

FORWARD - LOOKING AND CAUTIONARY STATEMENTS 

This Annual Report contains “forward-looking statements” as defined in the Private Securities Litigation Reform 

Act of 1995. All statements other than statements of historical fact, including, without limitation, the statements under 
“Management’s Discussion and Analysis of Financial Condition and Results of Operations” are “forward-looking 
statements.” Forward-looking statements may include the words “believes,” “expects,” “plans,” “intends,” “anticipates,” 
“continues” or other similar expressions. These statements are based on the Company’s current expectations of future 
events and are subject to a number of risks and uncertainties that may cause the Company’s actual results to differ 
materially from those described in the forward-looking statements. Should one or more of these risks or uncertainties 
materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, 
estimated or projected. The Company assumes no obligation to revise or update any forward-looking statements for any 
reason, except as required by law.  

The Company files annual, quarterly and current reports, proxy statements and other information with the 
Securities and Exchange Commission (the “SEC”). These filings are available to the public via the Internet at the SEC’s 
website located at http://www.sec.gov. You may also read and copy any document the Company files with the SEC at the 
SEC’s public reference room located at 100 F Street, N.E., Washington, D.C. 20549. For more information, please call the 
SEC at 1-800-SEC-0330.  

The Company’s website is located at www.enzo.com. The Company makes available on its website a link to all 
filings that it makes with the SEC. You may request a copy of the Company’s filings with the SEC (excluding exhibits) at 
no cost by writing or telephoning us at the following address or telephone number: 

Enzo Biochem, Inc.  
527 Madison Ave.  
New York, New York 10022  
Tel: (212) 583-0100  
Attn: Investor Relations  

23

Item 1A. Risk Factors

Risks relating to our Company and our industries

We have experienced significant losses in our last five fiscal years and quarter to quarter over such 

periods and our losses have resulted in the use of cash in operations. If such losses and cash uses continue the 
value of your investment could decline significantly. 

We incurred a net loss of $22.2 million and $23.6 million for the fiscal years ended July 31, 2010 and 2009, 
respectively. If our revenues do not increase, or if our operating expenses exceed expectations or cannot be reduced, we 
will continue to suffer substantial losses and use cash in operations which could have an adverse effect on our business 
and adversely affect your investment in our Company.  

Our operating results may vary from period to period. 

Our operating results may vary significantly from quarter to quarter and from year to year, depending on a variety 

of factors including: 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

competitive conditions, including changes in third-party reimbursements: 

health care reform regulations affecting providers and plan sponsors; 

exchange rate fluctuations; 

changes in tax laws, the results of tax audits or the measurement of tax uncertainties; 

the timing of our research and development, sales and marketing expenses; 

the introduction of new products by us or our competitors; 

the success of identifying, acquiring and integrating businesses that complement our product offerings, 
add new technology or add presence in a market; 

expenses associated with defending our intellectual property portfolio; 

customer demand for our products due to changes in purchasing requirements and research needs; 

general worldwide economic conditions affecting funding of research and; 

seasonal fluctuations affected by weather and holiday periods. 

Consequently, results for any interim period may not necessarily be indicative of results in subsequent periods.  

Our future success will depend in part upon our ability to enhance existing products and to develop and 

introduce new products. 

The market for our products is characterized by rapidly changing technology, evolving industry standards and new 

product introductions, which may make our existing products obsolete. Our future success will depend in part upon our 
ability to enhance existing products and to develop and introduce new products.  

The development of new or enhanced products is a complex and uncertain process requiring the accurate 

anticipation of technological and market trends as well as precise technological execution. In addition, the successful 
development of new products will depend on the development of new technologies. We will be required to undertake time-
consuming and costly development activities and to seek regulatory approval for these new products. We may experience 
difficulties that could delay or prevent the successful development, introduction and marketing of these new products. 
Regulatory clearance or approval of any new products may not be granted by the FDA or foreign regulatory authorities on 
a timely basis, or at all, and the new products may not be successfully commercialized.  

We may be unable to identify, acquire and integrate acquisition targets. 

In the past four fiscal years we have made significant acquisitions in our Life Sciences segment. Our strategy 
envisions that a part our future growth will come from acquiring and integrating similar operations and/or product lines. 
There can be no assurance that we will be able to identify suitable acquisition candidates and, once identified, to 
negotiate successfully their acquisition at a price or on terms and conditions favorable to us, or to integrate the operations 
of such acquired businesses with the existing operations. In addition, we compete for acquisition candidates with other 
entities, some of which have greater financial resources than ours. Our failure to implement successfully its acquisition 
strategy would limit our potential growth.  

24

Our inability to carry out certain of our marketing and sales plans may make it difficult for us to grow or 

maintain our business. 

The Life Sciences segment continues an aggressive marketing program designed to more directly service its end 
users, while simultaneously promoting numerous brands. We will continue to expand the reach of companies by our direct 
field sales force, the on-going enhancement of our interactive websites, continued attendance at top industry trade 
meetings, and publications in leading scientific journals. In addition to our direct sales, we operate worldwide through 
wholly-owned subsidiaries (in USA, Switzerland, Belgium, Germany, and the UK) and a network of third-party distributors 
in most other significant markets. If we are unable to successfully continue these programs, we may be unable to grow 
and our business could suffer.  

We face intense competition, which could cause us to decrease the prices for our products or services or 

render our products uneconomical or obsolete, any of which could reduce our revenues and limit our growth. 

Our competitors in the biotechnology industry in the United States and abroad are numerous and include major 

pharmaceutical, energy, food and chemical companies, as well as specialized genetic engineering firms. Many of our 
large competitors have substantially greater resources than us and have the capability of developing products which 
compete directly with our products. Many of these companies are performing research in the same areas as we are. The 
markets for our products are also subject to competitive risks because markets are highly price competitive. Our 
competitors have competed in the past by lowering prices on certain products.  

The clinical laboratory business is highly fragmented and intensely competitive, and we compete with numerous 
national and local companies. Some of these entities are larger than we are and have greater resources than we do. We 
compete primarily on the basis of the quality of our testing, reporting and information services, our reputation in the 
medical community, the pricing of our services and our ability to employ qualified professionals.  

These competitive conditions could, among other things:  

• 

• 

• 

• 

• 

Require us to reduce our prices to retain market share;  

Require us to increase our marketing efforts which could reduce our profit margins;  

Increase our cost of labor to attract qualified personnel; 

Render our biotechnology products uneconomical or obsolete or;  

Reduce our revenue.  

We depend on distributors and contract manufacturers and suppliers for materials that could impair our 

ability to manufacture or distribute our products. 

Outside distributors, suppliers and contract manufacturers provide key finished goods, components and raw 

materials used in the sale and manufacture of our products. Our Life Sciences segment distributes product for over 40 
unrelated third party manufacturers. To the extent we are unable to maintain or replace a distributor in a reasonable time 
period, or on commercially reasonable terms, if at all, our operations could be disrupted. Although we believe that 
alternative sources for components and raw materials are available, any supply interruption in a limited or sole source 
component or raw material would harm our ability to manufacture our products until a new source of supply is identified 
and qualified. In addition, an uncorrected defect or supplier’s variation in a component or raw material, either unknown to 
us or incompatible with our manufacturing process, could harm our ability to manufacture products. We might not be able 
to find a sufficient alternative supplier in a reasonable time period, or on commercially reasonable terms, if at all. If we fail
to obtain a supplier for the components of our products, our operations could be disrupted.  

We use hazardous materials in our business. Any claims relating to improper handling, storage or 

disposal of these materials could be costly and time-consuming. 

Our manufacturing, clinical laboratory and research and development processes involve the storage, use and 

disposal of hazardous substances, including hazardous chemicals, biological hazardous materials and radioactive 
compounds. We are subject to governmental regulations governing the use, manufacture, storage, handling and disposal 
of materials and waste products. Although we believe that our safety and environmental management practices and 
procedures for handling and disposing of these hazardous materials are in accordance with good industry practice and 
comply with applicable laws, permits, licenses and regulations, the risk of accidental environmental or human 
contamination or injury from the release or exposure of hazardous materials cannot be completely eliminated. In the event 
of an accident, we could be held liable for any damages that result, including environmental clean-up or decontamination 
costs, and any such liability could exceed the limits of, or fall outside the coverage of, our insurance.  

25

We may not be able to maintain insurance on acceptable terms, or at all. We could be required to incur significant 

costs to comply with current or future environmental and public and workplace safety and health laws and regulations.  

We are required to expend significant resources for research and development for our products in 

development and these products may not be developed successfully. Failure to successfully develop these 
products may prevent us from earning a return on our research and development expenditures. 

The products we are developing are at various stages of development and clinical evaluations and may require 
further technical development and investment to determine whether commercial application is practicable. There can be 
no assurance that our efforts will result in products with valuable commercial applications. Our cash requirements may 
vary materially from current estimates because of results of our research and development programs, competitive and 
technological advances and other factors. In any event, we will require substantial funds to conduct development activities 
and pre-clinical and clinical trials, apply for regulatory approvals and commercialize products, if any, that are developed. 
We do not have any commitments or arrangements to obtain any additional financing and there is no assurance that 
required financing will be available to us on acceptable terms, if at all. Even if we spend substantial amounts on research 
and development, our potential products may not be developed successfully. If our product candidates on which we have 
expended significant amounts for research and development are not commercialized, we will not earn a return on our 
research and development expenditures, which may harm our business.  

Risks relating to our Intellectual Property and Regulatory Approval

Protecting our proprietary rights is difficult and costly. If we fail to adequately protect or enforce our 

proprietary rights, we could lose potential revenue from licensing and royalties. 

Our potential revenue and success depends in large part on our ability to obtain, maintain and enforce our 

patents. Our ability to commercialize any product successfully will largely depend on our ability to obtain and maintain 
patents of sufficient scope to prevent third parties from developing similar or competitive products.  

In the absence of patent protection, competitors may impact our business by developing and marketing 

substantially equivalent products and technology.  

Patent disputes are frequent and can preclude the commercialization of products. We have in the past been, are 

currently, and may in the future be, involved in material patent litigation, such as the matters discussed under “Part I - Item
3. Legal Proceedings” in this report. Patent protection litigation is time-consuming and we have incurred significant legal 
costs. In addition, an adverse decision could force us to either obtain third-party licenses at a material cost or cease using 
the technology or product in dispute.  

We have filed applications for United States and foreign patents covering certain aspects of our technology, but 

there is no assurance that pending patents will issue or as to the degree of protection which any issued patent might 
afford.

Lawsuits, including patent infringements, in the biotechnology industry are not uncommon. If we become 

involved in any significant litigation, we would suffer as a result of the diversion of our management’s attention, 
the expense of litigation and any judgments against us. 

In addition to intellectual property litigation for infringement, other substantial, complex or extended litigation could 

result in large expenditures by us and distraction of our management. Patent litigation is time-consuming and costly in its 
own right and could subject us to significant liabilities to third parties. In addition, an adverse decision could force us to 
either obtain third-party licenses at a material cost or cease using the technology or product in dispute. In addition, 
lawsuits by employees, stockholders, collaborators or distributors could be very costly and substantially disrupt our 
business. Disputes from time to time with companies or individuals are not uncommon in the biotechnology industry, and 
we cannot assure you that we will always be able to resolve them out of court.  

We also utilize certain unpatented proprietary technology.  

We may incur impairment charges on our goodwill and other intangible assets with indefinite lives that 

would reduce our earnings. 

We are subject to Statement of Financial Accounting Standards ASC 350, “Intangibles, Goodwill and Other (“ASC 

350”) which requires that goodwill and other intangible assets that have an indefinite life be tested at least annually for 
impairment. Goodwill and other intangible assets with indefinite lives must also be tested for impairment between the 
annual tests if a triggering event occurs that would likely reduce the fair value of the asset below its carrying amount.  

As of July 31, 2010, goodwill and other intangible assets with indefinite lives represented approximately 29% of 

our total assets. If we determine that there has been impairment, our financial results for the relevant period would be 
reduced by the amount of the impairment, net of tax effects, if any.  

26

We may be unable to obtain or maintain regulatory approvals for our products, which could reduce our 

revenue or prevent us from earning a return on our research and development expenditures. 

Our research, preclinical development, clinical trials, product manufacturing and marketing are subject to 
regulation by the FDA and similar health authorities in foreign countries. FDA approval is required for our products, as well 
as the manufacturing processes and facilities, if any, used to produce our products that may be sold in the United States. 
The process of obtaining approvals from the FDA is costly, time consuming and often subject to unanticipated delays. 
Even if regulatory approval is granted, such approval may include significant limitations on indicated uses for which any 
products could be marketed. Further, even if such regulatory approvals are obtained, a marketed product and its 
manufacturer are subject to continued review, and later discovery of previously unknown problems may result in 
restrictions on such product or manufacturer, including withdrawal of the product from the market.  

New government regulations in the United States or foreign countries also may be established that could delay or 

prevent regulatory approval of our products under development. Further, because gene therapy is a relatively new 
technology and has not been extensively tested in humans, the regulatory requirements governing gene therapy products 
are uncertain and may be subject to substantial further review by various regulatory authorities in the United States and 
abroad. This uncertainty may result in extensive delays in initiating clinical trials and in the regulatory approval process. 
Our failure to obtain regulatory approval of their proposed products, processes or facilities could have a material adverse 
effect on our business, financial condition and results of operations. The proposed products under development may also 
be subject to certain other federal, state and local government regulations, including, but not limited to, the Federal Food, 
Drug and Cosmetic Act, the Environmental Protection Act, and Occupational Safety and Health Act, and state, local and 
foreign counterparts to certain of such acts.  

We cannot be sure that we can obtain necessary regulatory approvals on a timely basis, if at all, for any of the 
products we are developing or manufacturing or that we can maintain necessary regulatory approvals for our existing 
products, and all of the following could have a material adverse effect on our business: 

• 

• 

• 

• 

significant delays in obtaining or failing to obtain required approvals; 

loss of, or changes to, previously obtained approvals; 

failure to comply with existing or future regulatory requirements and; 

changes to manufacturing processes, manufacturing process standards or Good Manufacturing Practices 
following approval or changing interpretations of these factors.  

Adverse perception and increased regulatory scrutiny of gene medicine and genetic research might limit 

our ability to conduct our business. 

Ethical, social and legal concerns about gene medicine, genetic testing and genetic research could result in 
additional regulations restricting or prohibiting the technologies we or our collaborators may use. Recently, gene medicine 
studies have come under increasing scrutiny, which has delayed ongoing and could delay future clinical trials and 
regulatory approvals. Federal and state agencies, congressional committees and foreign governments have expressed 
interest in further regulating biotechnology. More restrictive regulations or claims that our products are unsafe or pose a 
hazard could prevent us from commercializing any products.  

Risks relating to our Clinical Labs services segment

Our clinical laboratory business is subject to extensive government regulation and our loss of any 

required certifications or licenses could require us to cease operating this part of our business, which would 
reduce our revenue and injure our reputation. 

The clinical laboratory industry is subject to significant governmental regulation at the Federal, state and local 

levels. Under the Clinical Laboratory Improvement Act of 1967 and the Clinical Laboratory Improvement Amendments of 
1988 (collectively, as amended, “CLIA”) virtually all clinical laboratories, including ours, must be certified by the Federal 
government. Many clinical laboratories also must meet governmental standards, undergo proficiency testing and are 
subject to inspection. Certifications or licenses are also required by various state and local laws. The failure of our clinical
laboratory to obtain or maintain such certifications or licenses under these laws could interrupt our ability to operate our 
clinical laboratory business and injure our reputation.  

Reimbursements from third-party payers, upon which our clinical laboratory business is dependent, are 

subject to inconsistent rates and coverage and legislative reform that are beyond our control. This inconsistency 
and any reform that decreases coverage and rates could reduce our earnings and harm our business. 

27

Our clinical laboratory business is primarily dependent upon reimbursement from third-party payers, such as 

Medicare (which principally serves patients 65 and older) and insurers. We are subject to variances in reimbursement 
rates among different third-party payers, as well as constant renegotiation of reimbursement rates. We also are subject to 
audit by Medicare which can result in the return of payments made to us under these programs. These variances in 
reimbursement rates and audit results could reduce our margins and thus our earnings.  

The health care industry continues to undergo significant change as third-party payers’ increase their efforts to 
control the cost, utilization and delivery of health care services. In an effort to address the problem of increasing health 
care costs, legislation has been proposed or enacted at both the Federal and state levels to regulate health care delivery 
in general and clinical laboratories in particular. Some of the proposals include managed competition, global budgeting 
and price controls. Changes that decrease reimbursement rates or coverage, or increase administrative burdens on billing 
third-party payers could reduce our revenues and increase our expenses.  

U.S. healthcare reform legislation may result in significant change and our business could be adversely 

impacted if we fail to adapt. 

Government oversight of and attention to the healthcare industry in the United States is significant and increasing. 

In March 2010, U.S. federal legislation was enacted to reform healthcare. The legislation provides for reductions in the 
Medicare clinical laboratory fee schedule of 1.9% for five years beginning in 2010 and also includes a productivity 
adjustment which reduces the CPI market basket update beginning in 2011. In 2010, approximately 25% of our Clinical 
Lab’s segment revenues were reimbursed by Medicare under the clinical laboratory fee schedule. The legislation imposes 
an excise tax on the seller for the sale of certain medical devices in the United States, including those purchased and 
used by laboratories, beginning in 2013. The legislation establishes the Independent Payment Advisory Board, which will 
be responsible, beginning in 2014, annually to submit proposals aimed at reducing Medicare cost growth while preserving 
quality. These proposals automatically will be implemented unless Congress enacts alternative proposals that achieve the 
same savings targets.  

Further, the legislation calls for a Center for Medicare and Medicaid Innovation that will examine alternative 

payment methodologies and conduct demonstration programs. The legislation provides for extensive health insurance 
reforms, including the elimination of pre-existing condition exclusions and other limitations on coverage, fixed percentages 
on medical loss ratios, expansion in Medicaid and other programs, employer mandates, individual mandates, creation of 
state and regional health insurance exchanges, and tax subsidies for individuals to help cover the cost of individual 
insurance coverage. The legislation also permits the establishment of accountable care organizations, a new healthcare 
delivery model. While the ultimate impact of the legislation on the healthcare industry is unknown, it is likely to be 
extensive and may result in significant change. Our failure to adapt to these changes could have a material adverse effect 
on our business.  

Changes in provider mix, including continued growth in capitated managed-cost health care and changes 

in certain third party provider agreements could have a material adverse impact on the Company’s net revenues 
and profitability. 

Certain third party provider companies have adopted national and regional programs which include multiple 
managed-care reimbursement models. If the Company is unable to participate in these programs or if the Company would 
lose a material contract, it could have a material adverse impact on the Company’s net revenues and profitability.

The number of individuals covered under managed care contracts or other similar arrangements has grown over 

the past several years and may continue to grow in the future. In addition, Medicare and other government healthcare 
programs may continue to shift to managed care. Entities providing managed care coverage have reduced payments for 
medical services, including clinical laboratory services, in numerous ways such as entering into arrangements under 
which payments to a service provider are capitated, limiting testing to specified procedures, denying payment for services 
performed without prior authorization and refusing to increase fees for specified services. These trends reduce our 
revenues and limit our ability to pass cost increases to our customers. Also, if these or other managed care organizations 
do not select us as a participating provider, we may lose some or all of that business, which could have an adverse effect 
on our business, financial condition and results of operations.  

Because of competitive pressures, impacts of the economy on patient traffic at our customers and the 

complexity and expense of the billing process in our clinical laboratory business, we must obtain new customers 
while maintaining existing customers to grow our business. 

Intense competition in the clinical laboratory business, increasing administrative burdens upon the reimbursement 
process, reduced patient traffic, and reduced coverage and payments by insurers make it necessary for us to increase our 
volume of laboratory services. To do so, we must obtain new customers while retaining existing customers. 

28

Our failure to attract new customers or the loss of existing customers or a reduction in business from those 

customers could significantly reduce our revenues and impede our ability to grow.  

Compliance with Medicare administrative policies, including those pertaining to certain automated blood 

chemistry profiles, may reduce the reimbursements we receive. 

Containment of health care costs, including reimbursement for clinical laboratory services, has been a focus of 

ongoing governmental activity. Clinical laboratories must bill Medicare directly for the services provided to Medicare 
beneficiaries and may only collect the amounts permitted under this fee schedule. Reimbursement to clinical laboratories 
under the Medicare Fee Schedule has been steadily declining since its inception. Furthermore, Medicare has mandated 
use of the Physicians Current Procedural Terminology, or CPT, for coding of laboratory services which has altered the 
way we bill these programs for some of our services, thereby reducing the reimbursement that we receive.  

In March 1996, HCFA (now, the Center for Medicare and Medicaid Services or CMS) implemented changes in the 
policies used to administer Medicare payments to clinical laboratories for the most frequently performed automated blood 
chemistry profiles. Among other things, the changes established a consistent standard nationwide for the content of the 
automated chemistry profiles. Another change requires laboratories performing certain automated blood chemistry profiles 
to obtain and provide documentation of the medical necessity of tests included in the profiles for each Medicare 
beneficiary. Reimbursements have been reduced as a result of this change. Because a significant portion of our costs is 
fixed, these Medicare reimbursement reductions and changes have a direct adverse effect on our net earnings and cash 
flows.  

Regulations requiring the use of “standard transactions” for healthcare services issued under the Health 
Insurance Portability and Accountability Act of 1996, or HIPAA, may negatively impact our profitability and cash 
flows. 

Pursuant to the Health Insurance Portability and Accountability Act of 1996, or HIPAA, the Secretary of the 

Department of Health and Human Services, or HHS, has issued final regulations designed to improve the efficiency and 
effectiveness of the healthcare system by facilitating the electronic exchange of information in certain financial and 
administrative transactions while protecting the privacy and security of the information exchanged. Three principal 
regulations have been issued in final form: standards for electronic transactions, security regulations and privacy 
regulations.  

The HIPAA transaction standards are complex, and subject to differences in interpretation by payers. For 
instance, some payers may interpret the standards to require us to provide certain types of information, including 
demographic information not usually provided to us by physicians. While most of our transactions are submitted and / or 
received in ANSI standard format, inconsistent application of transaction standards by some remaining payers or our 
inability to obtain certain billing information not usually provided to us by physicians could increase our costs and the 
complexity of billing. In addition, new requirements for additional standard transactions, such as claims attachments, could 
prove technically difficult, time-consuming or expensive to implement. We are working closely with our payers to establish 
acceptable protocols for claims submissions and with our industry trade association and an industry coalition to present 
issues and problems as they arise to the appropriate regulators and standards setting organizations.  

Compliance with the HIPAA security regulations and privacy regulations may increase our costs. 

The HIPAA privacy and security regulations established comprehensive federal standards with respect to the 

uses and disclosures of protected health information by health plans, healthcare providers and healthcare clearinghouses, 
in addition to setting standards to protect the confidentiality, integrity and availability of protected health information. The
regulations establish a complex regulatory framework on a variety of subjects, including: 

• 

• 

• 

• 

the circumstances under which uses and disclosures of protected health information are permitted or 
required without a specific authorization by the patient, including but not limited to treatment purposes, 
activities to obtain payments for our services, and our healthcare operations activities; 

a patient’s rights to access, amend and receive an accounting of certain disclosures of protected health 
information;

the content of notices of privacy practices for protected health information and; 

administrative, technical and physical safeguards required of entities that use or receive protected health 
information.

29

We have implemented practices to meet the requirements of the HIPAA privacy and security regulations, as 
required by law. The privacy regulations establish a “floor” and do not supersede state laws that are more stringent. 
Therefore, we are required to comply with both federal privacy regulations and varying state privacy laws. In addition, for 
healthcare data transfers from other countries relating to citizens of those countries, we must comply with the laws of 
those other countries. The federal privacy regulations restrict our ability to use or disclose patient-identifiable laboratory 
data, without patient authorization, for purposes other than payment, treatment or healthcare operations (as defined by 
HIPAA), except for disclosures for various public policy purposes and other permitted purposes outlined in the privacy 
regulations. The privacy and security regulations provide for significant fines and other penalties for wrongful use or 
disclosure of protected health information, including potential civil and criminal fines and penalties. Although the HIPAA 
statute and regulations do not expressly provide for a private right of damages, we also could incur damages under state 
laws to private parties for the wrongful use or disclosure of confidential health information or other private personal 
information.

Compliance with all of the HIPAA regulations, including new standard transactions, requires ongoing resources 

from all healthcare organizations, not just clinical laboratories. While we believe our total costs to comply with HIPAA will 
not be material to our operations or cash flows, new standard transactions and additional customer requirements resulting 
from different interpretations of the current regulations could impose additional costs on us.  

FDA regulation of laboratory-developed tests, analyte specific reagents, or genetic testing could lead to 

increased costs and delays in introducing new genetic tests. 

The FDA has regulatory responsibility over instruments, test kits, reagents and other devices used to perform 

diagnostic testing by clinical laboratories. In the past, the FDA has claimed regulatory authority over laboratory-developed 
tests, but has exercised enforcement discretion in not regulating tests performed by high complexity CLIA-certified 
laboratories. In December 2000, the HHS Secretary’s Advisory Committee on Genetic Testing recommended that the 
FDA be the lead federal agency to regulate genetic testing. In late 2002, a new HHS Secretary’s Advisory Committee on 
Genetics, Health and Society, or SACGHS, was appointed to replace the prior Advisory Committee. Ultimately, SACGHS 
decided that it would continue to monitor the progress of the federal agencies in the oversight of genetic technologies, but 
it did not believe that further action was warranted. In the meantime, the FDA is considering revising its regulations on 
analyte specific reagents, which are used in laboratory-developed tests, including laboratory-developed genetic testing. 
FDA interest in or actual regulation of laboratory-developed tests or increased regulation of the various medical devices 
used in laboratory-developed testing could lead to periodic inquiry letters from the FDA and increased costs and delays in 
introducing new tests, including genetic tests.  

In the past, the clinical laboratory industry has received negative publicity. This publicity has led to increased 

legislation, regulation, and review of industry practices. These factors may adversely affect our ability to market our 
services, require us to change our services and increase the regulatory burdens under which we operate, further 
increasing the costs of doing business and adversely affecting our operating results. If we experience a significant 
disruption in our information technology systems, including our website, or if we fail to implement new systems and 
software successfully, our business could be adversely affected.  

If we fail to maintain or monitor our information systems our businesses could be adversely affected.

We depend on information systems throughout our Company to control our Life Science manufacturing, inventory, 
distribution and website and the Clinical Lab processes for: processing orders, managing inventory, processing shipments 
to and collecting cash from our customers, responding to customer inquiries, contributing to our overall internal control 
processes, maintaining records of our property, plant and equipment, and recording and paying amounts due vendors and 
other creditors. If we were to experience a prolonged disruption in our information systems that involve interactions with 
customers and suppliers, it could result in the loss of sales and customers and/or increased costs, which could adversely 
affect our business.  

If we fail to attract and retain key personnel, including our senior management, our business could be 

adversely affected. 

Most of our products and services are highly technical in nature. In general, only highly qualified and trained 

scientists and technician personnel have the necessary skills to develop proprietary technological products and market 
our products, support our research and development programs and provide our Clinical Lab services.  

In addition, some of our manufacturing, quality control, safety and compliance, information technology and e-

commerce related positions are highly technical as well. Further, our sales personnel highly trained and are important to 
retaining and growing our businesses. Our success depends in large part upon our ability to identify, hire, retain and 
motivate highly skilled professionals.  

30

We face intense competition for these professionals from our competitors, customers, marketing partners and 

other companies throughout the industries in which we compete. Since our inception we have successfully recruited and 
hired qualified key employees. Any failure on our part to hire, train, and retain a sufficient number of qualified 
professionals would seriously damage our business.  

We depend heavily on the services of our senior management. We believe that our future success depends on 

the continued services of such management. Our business may be harmed by the loss of a significant number of our 
senior management in a short period of time.  

The insurance we purchase to cover our potential business risk may be inadequate. 

Although we believe that our present insurance coverage is sufficient to cover our current estimated exposures, 
we cannot assure that we will not incur liabilities in excess of our policy limits. In addition, although we believe that will be
able to continue to obtain adequate coverage, we cannot assure that we will be able to do so at acceptable costs.  

Risks relating to our international operations

Foreign currency exchange rate fluctuations may adversely affect our business. 

Since we operate as a multinational corporation that sells and sources products in many different countries, 

changes in exchange rates could in the future, adversely affect our cash flows and results of operations.  

Furthermore, reported sales and purchases made in non-U.S. currencies by our international businesses, when 

translated into U.S. dollars for financial reporting purposes, fluctuate due to exchange rate movement. Due to the number 
of currencies involved, the variability of currency exposures and the potential volatility of currency exchange rates, we 
cannot predict the effect of exchange rate fluctuations on future sales and operating results.  

We are subject to economic, political and other risks associated with our significant international 

business, which could adversely affect our financial results. 

We operate internationally primarily through wholly-owned subsidiaries located in North America and Europe. 
Revenues outside the United States were approximately 15% of total revenues in fiscal 2010. Our sales and earnings 
could be adversely affected by a variety of factors resulting from our international operations, including 

• 

• 

• 

• 

• 

• 

• 

• 

future fluctuations in exchange rates; 

complex regulatory requirements and changes in those requirements; 

trade protection measures and import or export licensing requirements; 

multiple jurisdictions and differing tax laws, as well as changes in those laws; 

restrictions on our ability to repatriate investments and earnings from foreign operations; 

changes in the political or economic conditions in a country or region, particularly in developing or 
emerging markets; 

changes in shipping costs and; 

difficulties in collecting on accounts receivable.  

If any of these risks materialize, we could face substantial increases in costs, the reduction of profit and the 

inability to do business.  

31

Risks Relating to our Common Stock

Our stock price has been volatile, which could result in substantial losses for investors. 

Our common stock is quoted on the New York Stock Exchange, and there has been historical volatility in the 

market price of our common stock. The trading price of our common stock has been, and is likely to continue to be, 
subject to significant fluctuations due to a variety of factors, including: 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

fluctuations in our quarterly operating and earnings per share results; 

the gain or loss of significant contracts; 

loss of key personnel; 

announcements of technological innovations or new products by us or our competitors; 

delays in the development and introduction of new products; 

legislative or regulatory changes; 

general trends in the industries we operate; 

recommendations and/or changes in estimates by equity and market research analysts; 

biological or medical discoveries; 

disputes and/or developments concerning intellectual property, including patents and litigation matters; 

public concern as to the safety of new technologies; 

sales of common stock of existing holders; 

securities class action or other litigation; 

developments in our relationships with current or future customers and suppliers and; 

general economic conditions, both in the United States and worldwide.  

In addition, the stock market in general has experienced extreme price and volume fluctuations that have affected 
the market price of our common stock, as well as the stock of many companies in our industries. Often, price fluctuations 
are unrelated to operating performance of the specific companies whose stock is affected.  

In the past, following periods of volatility in the market price of a company’s stock, securities class action litigation 

has occurred against the issuing company. If we were subject to this type of litigation in the future, we could incur 
substantial costs and a diversion of our management’s attention and resources, each of which could have a material 
adverse effect on our revenue and earnings. Any adverse determination in this type of litigation could also subject us to 
significant liabilities.  

Because we do not intend to pay cash dividends on our common stock, an investor in our common stock 

will benefit only if it appreciates in value. 

We currently intend to retain our retained earnings and future earnings, if any, to finance the expansion of our 
business and do not expect to pay any cash dividends on our common stock in the foreseeable future. As a result, the 
success of an investment in our common stock will depend entirely upon any future appreciation. There is no guarantee 
that our common stock will appreciate in value or even maintain the price at which investors purchased their shares.  

It may be difficult for a third party to acquire us, which could inhibit stockholders from realizing a 

premium on their stock price. 

We are subject to the New York anti-takeover laws regulating corporate takeovers. These anti-takeover laws 

prohibit certain business combinations between a New York corporation and any “interested shareholder” (generally, the 
beneficial owner of 20% or more of the corporation’s voting shares) for five years following the time that the shareholder 
became an interested shareholder, unless the corporation’s board of directors approved the transaction prior to the 
interested shareholder becoming interested.  

32

Our certificate of incorporation, as amended, and by-laws contain provisions that could have the effect of 
delaying, deferring or preventing a change in control of us that stockholders may consider favorable or beneficial. These 
provisions could discourage proxy contests and make it more difficult for stockholders to elect directors and take other 
corporate actions. These provisions could also limit the price that investors might be willing to pay in the future for shares 
of our common stock. These provisions include: 

• 

• 

a staggered board of directors, so that it would take three successive annual meetings to replace all 
directors; and  

advance notice requirements for the submission by stockholders of nominations for election to the board 
of directors and for proposing matters that can be acted upon by stockholders at a meeting.  

Future sales of shares of our common stock or the issuance of securities senior to our common stock 

could adversely affect the trading price of our common stock and our ability to raise funds in new equity 
offerings.

We are not restricted from issuing additional common stock, preferred stock or securities convertible into or 

exchangeable for common stock. Future sales of a substantial number of our shares of common stock or equity-related 
securities in the public market or privately, or the perception that such sales could occur, could adversely affect prevailing 
trading prices of our common stock, and could impair our ability to raise capital through future offerings of equity or equity-
related securities. No prediction can be made as to the effect, if any, that future sales of shares of common stock or the 
availability of shares of common stock for future sale will have on the trading price of our common stock.  

Item 1B. Unresolved Staff Comments

None  

33

Item 2. Properties

The following are the principal facilities of the Company:

Location

Primary use

Segments 

Leased/owned

Square footage

Farmingdale, NY 
(Note 1) 

  Clinical laboratory and research 

  Clinical Labs,   
Therapeutics   

Leased 

Farmingdale, NY 

  Manufacturing, research, sales 

Life Sciences,   Owned 

and administrative office 

  Other 

New York, NY 
(Note 2) 

San Diego, CA 
(Note 3) 

  Corporate headquarters 

  Other 

Leased 

  Sales, administration and distribution  

Life Sciences   

Leased 

43,000

22,000

11,300

8,800

Lausen, Switzerland 
(Note 3) 

  Operational headquarters in 
  Europe, including sales and 

distribution 

Life Sciences   

Leased 

15,400

Plymouth Meeting, Pa 
(Note 4) 

  Sales, manufacturing, research, 
administration and distribution 

Life Sciences   

Leased 

19,500

Exeter, United Kingdom   Sales, manufacturing, research, 
(Note 4) 

administration and distribution 

Life Sciences   

Leased 

3,642

Ann Arbor, Michigan 
(Note 5) 

  Sales, manufacturing, research, 
administration and distribution 

Life Sciences   

Leased 

26,820

Note 1   - In March 2005, the Company amended and extended the lease for its Farmingdale laboratory for a 

period of 12 years (See Note 15 to the Consolidated Financial Statements). 

Note 2   – In February 2010, the lease, which includes 4,100 square feet under a sublease rental agreement 

through December 31, 2011, was extended through May 2020.  

Note 3   – The lease for this property was acquired in connection with the Axxora acquisition in May 2007.  

Note 4   – The leases for these properties were acquired in connection with the Biomol International acquisition in 

May 2008 and expire through 2017. 

Note 5   - The lease for this property, which expires in 2013, was acquired in connection with the Assay Designs 

acquisition in March 2009.  

We believe the current facilities are suitable and adequate for the Company’s current operating needs for 

its clinical laboratories, life science and therapeutics segments and that the production capacity in various 
locations is sufficient to manage product requirements.  

34

 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 3. Legal Proceedings

In October 2002, the Company filed suit in the United States District Court of the Southern District of New York 

against Amersham plc, Amersham Biosciences, Perkin Elmer, Inc., Perkin Elmer Life Sciences, Inc., Sigma-Aldrich 
Corporation (“Sigma”), Sigma Chemical Company, Inc., Molecular Probes, Inc. and Orchid Biosciences, Inc. The counts 
set forth in the suit are for breach of contract; patent infringement; unfair competition under state law; unfair competition 
under federal law; tortious interference with business relations; and fraud in the inducement of contract. The complaint 
alleges that these counts arise out of the defendants’ breach of distributorship agreements with the Company concerning 
labeled nucleotide products and technology, and the defendants’ infringement of patents covering the same. In April, 
2003, the court directed that individual complaints be filed separately against each defendant. The defendants have 
answered the individual complaints and asserted a variety of affirmative defenses and counterclaims. Fact discovery is 
ongoing. The court issued a claim construction opinion on July 10, 2006. In January 2007, the remaining defendants 
moved for summary judgment. On March 13, 2009, the court denied defendants’ summary judgment motion and stayed 
the cases pending resolution of an appeal to the United States Court of Appeals for the Federal Circuit in Enzo’s 
Connecticut litigation against Applera Corporation and Tropix, Inc. On March 26, 2010, the United States Court of Appeals 
for the Federal Circuit reversed the District of Connecticut’s grant of summary judgment of invalidity as to various patents 
at issue in the Applera case, and remanded the Applera case for further proceedings consistent with the Federal Circuit’s 
opinion. In light of the Federal Circuit’s remand of the Applera case to the District of Connecticut and the impending trial, 
on May 27, 2010, the court maintained its stay of the cases until further notice. There can be no assurance that the 
Company will be successful with the remaining outstanding litigation. However, even if the Company is not successful, 
management does not believe that there will be a significant adverse monetary impact to the Company.  

In October 2003, the Company and Enzo Life Sciences, Inc., filed suit in the United States District Court of the 

Eastern District of New York against Affymetrix, Inc (“Affymetrix”). The complaint alleges that Affymetrix improperly 
transferred or distributed substantial business assets of the Company to third parties, including portions of the Company’s 
proprietary technology, reagent systems, detection reagents and other intellectual property. The complaint also charges 
that Affymetrix failed to account for certain shortfalls in sales of the Company’s products, and that Affymetrix improperly 
induced collaborators and customers to use the Company’s products in unauthorized fields or otherwise in violation of the 
agreement. The complaint seeks full compensation from Affymetrix to the Company for its substantial damages, in 
addition to injunctive and declaratory relief to prohibit, among other things, Affymetrix’s unauthorized use, development, 
manufacture, sale, distribution and transfer of the Company’s products, technology, and/or intellectual property, as well as 
to prohibit Affymetrix from inducing collaborators, joint venture partners, customers and other third parties to use the 
Company’s products in violation of the terms of the agreement and the Company’s rights In November 2003, Affymetrix, 
Inc. filed its own complaint against the Company and its subsidiary, Enzo Life Sciences, Inc., in the United States District 
Court for the Southern District of New York, seeking among other things, declaratory relief that Affymetrix, Inc., has not 
breached the parties’ agreement, that it has not infringed certain of Enzo’s Patents, and that certain of Enzo’s patents are 
invalid. The Affymetrix complaint also seeks damages for alleged breach of the parties’ agreement, unfair competition, 
and tortuous interference, as well as certain injunction relief to prevent alleged unfair competition and tortuous 
interference. The Company does not believe that the Affymetrix complaint has any merit and intends to defend vigorously. 
Affymetrix also moved to transfer venue of Enzo’s action to the Southern District of New York, where other actions 
commenced by Enzo were pending as well as Affymetrix’s subsequently filed action. On January 30, 2004, Affymetrix’s 
motion to transfer was granted. Accordingly, the Enzo and Affymetrix actions are now both pending in the Southern 
District of New York. Initial pleadings have been completed and discovery has commenced. The Court issued a Markman 
(claim construction) opinion on July 10, 2006. In January 2007, Affymetrix moved for summary judgment. In March 2009, 
the court denied Affymetrix’s motion and stayed the case pending resolution of an appeal in the United States Court of 
Appeals for the Federal Circuit in Enzo’s Connecticut litigation against Applera Corporation and Tropix, Inc. On March 26, 
2010, the United States Court of Appeals for the Federal Circuit reversed the District of Connecticut’s grant of summary 
judgment of invalidity as to various patents at issue in the Applera case, and remanded the Applera case for further 
proceedings consistent with the Federal Circuit’s opinion. In light of the Federal Circuit’s remand of the Applera case to 
the District of Connecticut and the impending trial, on May 27, 2010, the court maintained its stay of the Affymetrix case 
until further notice.  

35

In June 2004, Roche Diagnostic GmbH and Roche Molecular Systems, Inc. (collectively “Roche”) filed suit in the 

U.S. District Court of the Southern District of New York against Enzo Biochem, Inc. and Enzo Life Sciences, Inc. 
(collectively “Enzo”). The complaint was filed after Enzo rejected Roche’s latest cash offer to settle Enzo’s claims for, 
among other things, alleged breach of contract and misappropriation of Enzo’s assets. The complaint seeks declaratory 
judgment (i) of patent invalidity with respect to Enzo’s 4,994,373 patent (the “‘373 patent”), (ii) of no breach by Roche of its
1994 Distribution and Supply Agreement with Enzo (the “1994 Agreement”), (iii) that non-payment by Roche to Enzo for 
certain sales of Roche products does not constitute a breach of the 1994 Agreement, and (iv) that Enzo’s claims of 
ownership to proprietary inventions, technology and products developed by Roche are without basis. In addition, the suit 
claims tortious interference and unfair competition. The Company does not believe that the complaint has merit and 
intends to vigorously respond to such action with appropriate affirmative defenses and counterclaims. Enzo filed an 
Answer and Counterclaims on November 3, 2004 alleging multiple breaches of the 1994 Agreement and related 
infringement of Enzo’s ‘373 patent. Discovery has commenced. The Court issued a Markman opinion on July 10, 2006. 
On January 3, 2007, Roche moved for summary judgment. In March 2009, the court denied Roche’s motion and stayed 
the cases pending resolution of an appeal to the United States Court of Appeals for the Federal Circuit in Enzo’s 
Connecticut litigation against Applera Corporation and Tropix, Inc. On March 26, 2010, the United States Court of Appeals 
for the Federal Circuit reversed the District of Connecticut’s grant of summary judgment of invalidity as to various patents 
at issue in the Applera case, and remanded the Applera case for further proceedings consistent with the Federal Circuit’s 
opinion. In light of the Federal Circuit’s remand of the Applera case to the District of Connecticut and the impending trial, 
on May 27, 2010, the court maintained its stay of the Roche case until further notice.  

On June 7, 2004, the Company and Enzo Life Sciences, Inc., filed suit in the United States District Court for the 

District of Connecticut against Applera Corporation and its wholly-owned subsidiary Tropix, Inc. The complaint alleges 
infringement of six patents (relating to DNA sequencing systems, labeled nucleotide products, and other technology). Yale 
University is the owner of four of the patents and the Company is the exclusive licensee. These four patents are 
commonly referred to as the “Ward” patents. Accordingly, Yale is also a plaintiff in the lawsuit. Yale and Enzo are aligned 
in protecting the validity and enforceability of the patents. Enzo Life Sciences is the owner of the remaining two patents. 
The complaint seeks permanent injunction and damages (including treble damages for willful infringement). Defendants 
answered the complaint on July 29, 2004. The answer pleads affirmative defenses of invalidity, estoppels and laches and 
asserts counterclaims of non-infringement and invalidity. A Markman hearing was held on May 25, 2006 and the district 
court issued a ruling on October 12, 2006. On August 17, 2007, the Company voluntarily dismissed the infringement 
claims for one of the patents in suit without prejudice. Defendants similarly dismissed their defenses and counterclaims as 
to that patent. On the same date, the Company conceded a judgment of non-infringement for another of the patents in suit 
based on the district court’s claim construction, reserving the right to appeal their construction. The defendants filed 
motions for summary judgment for invalidity, laches and non-infringement of the Ward patents on March 5, 2007. The 
Company and other plaintiff filed a motion for summary judgment on infringement of the Ward patents on March 5, 2007. 
On September 6, 2007, the court granted defendants’ motion for summary judgment of invalidity of three of the remaining 
Ward patents and entered judgment to that effect. The Company and other plaintiff filed a notice of appeal to the United 
States Court of Appeals for the Federal Circuit on September 7, 2007. On January 30, 2008, the Court of Appeals for the 
Federal Circuit granted the Company’s alternative motion to dismiss its appeal and remand to the Connecticut Court for 
further proceedings incident to an entry of a final, appealable judgment. The Company requested the Connecticut Court to 
dispose of all outstanding issues (including the Company’s claim under the fourth Ward patent and certain counterclaims 
of Applera’s) and enter final judgment. The Connecticut Court granted this request. The Company subsequently filed an 
Appeal on April 7, 2009. On March 26, 2010, the Federal Circuit issued an order concluding that the claims of U.S. Patent 
Nos. 5,328,824 and 5,449,767 were not indefinite and that there were genuine issues of material fact as to anticipation. 
The Court reversed the district court’s summary judgment of invalidity of those two patents and remanded the case back 
to the Connecticut Court. Applera and Tropix then filed a combined petition for panel rehearing and rehearing en banc. On 
May 26, 2010, the Federal Circuit issued an order denying both petitions. The Defendants then filed a motion to stay the 
case in Connecticut pending resolution of its impending petition for writ of certiorari to the U.S. Supreme Court. Judge 
Arterton has not yet ruled on the stay motion. Applera filed its petition for certiorari on September 23, 2010. If the petition
is not granted, there can be no assurance that the Company will be successful in this litigation. Even if the Company is not 
successful, management does not believe that there will be a significant adverse monetary impact on the Company.  

36

In January 2006, the Company was named along with certain of its officers and directors among others, in several 
complaints titled Francis Scott Hunt, et al. v. Enzo Biochem Inc., et al., Index No. 06-CV-00170 (SAS) and Ken Roberts v. 
Enzo Biochem, Inc. et al., Index No. 06-CV-00213 (SAS), and Paul Lewicki v. Enzo Biochem Inc., et al., Index No. 06-CV-
06347 (SAS) based only upon a claim for common law fraud. These three consolidated actions were all filed in the United 
States District Court for the Southern District of New York (“the Court”). The actions seek damages in excess of $8 million 
and are all based on allegations of a fraudulent scheme to pump and dump Enzo securities as was initially set forth in a 
previous action (filed by the same attorney) which was dismissed by the Eastern District of Virginia and such dismissal 
was thereafter affirmed by the Fourth Circuit Court of Appeals and is now final since the U.S. Supreme Court denied a 
petition for certiorari. The Company and the other defendants likewise moved to dismiss all of the Complaints in these 
actions and that motion was granted by the Court. As a result, some of the Plaintiffs were no longer able to pursue their 
claims or choose not to pursue them further. Other Plaintiffs amended their Complaints and the Company and the other 
defendants moved once again to dismiss those Amended Complaints. The Court granted in part and denied in part those 
motions. The remaining Plaintiffs then conducted discovery, and following the completion of discovery, the Company and 
other defendants moved for summary judgment dismissal of the Amended Complaints. On June 5, 2009, the Court 
granted the defendants’ motion and dismissed all the Amended Complaints. The remaining Plaintiffs then filed a notice of 
appeal to the Second Circuit Court of Appeals. The appeal is still pending. The Company believes that the latest 
complaints in these actions have no merit and that the appeal also lacks merit. The Company will continue to defend 
these actions vigorously.  

On or about September 22, 2010, Mayflower Partners, L.P. f/k/a Biomol International, L.P. (“Mayflower”) filed an 

action against Enzo Biochem, Inc. and Enzo Life Sciences, Inc. (together “Enzo”) in the United States District Court for the 
Southern District of New York, alleging breach of the stock and asset purchase agreement dated as of May 8, 2008 
between Enzo and Mayflower (the “Agreement”). Pursuant to the Agreement, the Company acquired the assets of 
Mayflower, and agreed, among other things, to make certain contingent earn-out payments to Mayflower, accounted for 
as additional purchase price consideration, if certain performance thresholds were met for each of the two annual periods 
following the closing. Mayflower alleges that Enzo breached the Agreement by allegedly failing to operate the acquired 
business in good faith during the second earn-out period and engaging in conduct the primary purpose of which was to 
avoid making a second earn-out period payment under the Agreement. In addition, Mayflower claims that Enzo breached 
the Agreement by allegedly failing to provide the documentation appropriate to support the calculation of defined financial 
criteria for the second earn-out period as required under the Agreement. Enzo denies that it is in breach of the Agreement 
and will vigorously defend the suit.  

As part of the litigation, Mayflower moved by Order to Show cause to enjoin the accounting procedure specified 

under the Agreement. Mayflower’s motion was heard by a District Court Judge on September 27, 2010, who directed that 
the parties first go forward with the accounting as provided under the Agreement before moving further with the litigation. 
As provided under the Agreement, Mayflower’s maximum recovery in the event that it is successful on either the 
accounting or in litigation is settlement of the $2.5 million contingent earn-out in either Enzo common stock or cash, as set 
forth in the Agreement, plus attorney’s fees.  

The Company is party to other claims, legal actions and complaints that arise in the ordinary course of business. 
The Company believes that any liability that may ultimately result from the resolution of these matters will not, individually 
or in the aggregate, have a material adverse effect on its financial position or results of operations.  

Item 4. (Removed and Reserved)  

37

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities

The common stock of the Company is traded on the New York Stock Exchange (Symbol: ENZ). The following 

table sets forth the high and low price of the Company’s common stock for the periods indicated as reported on the New 
York Stock Exchange.  

2010 Fiscal Year (August 1, 2009 to July 31, 2010):

High 

Low 

1st Quarter  ................................................................................. 
2nd Quarter  ................................................................................ 
3rd Quarter ................................................................................. 
4th Quarter  ................................................................................. 

$
$
$
$

7.66 
6.24 
6.67 
6.18 

$  4.51 
$  4.52 
$  4.66 
$  3.90 

2009 Fiscal Year (August 1, 2008 to July 31, 2009): 

High 

Low 

1st Quarter  ................................................................................. 
2nd Quarter  ................................................................................ 
3rd Quarter ................................................................................. 
4th Quarter  ................................................................................. 

$ 14.90 
6.97 
$
5.58 
$
5.64 
$

$  4.44 
$  4.23 
$  2.86 
$  3.75 

As of September 30, 2010, the Company had approximately 1,009 stockholders of record of its common stock.  

The Company has not paid a cash dividend on its common stock and intends to continue a policy of retaining 

earnings to finance and build its operations. Accordingly, the Company does not anticipate the payment of cash dividends 
to holders of common stock in the foreseeable future.  

Securities Authorized for Issuance Under Equity Compensation Plans 

The following table sets forth information regarding our existing equity compensation plans as of July 31, 2010.  

Plan Category

Equity compensation plans approved by security 

holders  ..................................................................... 

Equity compensation plans not approved by security 

holders  ..................................................................... 
Total  ...................................................................... 

Number of securities
to be issued upon 
exercise of 
outstanding options,
warrants and rights
(a)

Weighted-average
exercise price of
outstanding options,
warrants and rights
(b)

Number of securities
remaining available
for future issuances
under equity 
compensation plans
(excluding securities
reflected in column
(a)
(c)

1,132,450 

$

— 
1,132,450 

$

14.30  

—  
14.30  

169,000 

— 
169,000 

38

 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
Item 6. Selected Financial Data

The following table, which is derived from the audited consolidated financial statements of the Company for the 

fiscal years 2006 through 2010 should be read together with the discussion in “Management’s Discussion and Analysis of 
Financial Condition and Results of Operations” and the Company’s consolidated financial statements and notes to those 
statements included elsewhere in this Annual Report on Form 10-K.  

Operating Results (1)
Operating revenues  ......................................................  $ 97,082  $ 89,572  $ 77,795  $ 52,908  $

2010 

2009 

For the fiscal year ended July 31, 
(In thousands, except per share amounts) 
2007 

2008 

2006 
39,826

Other income  ................................................................ 

Interest income  ............................................................. 

44 

19 

74 

171 

2,699 

—

581 

3,696 

5,092 

3,144

Loss before income taxes ............................................. 

(22,261) 

(23,477) 

(10,892)   

(13,175)   

(17,009)

Benefit (provision) for income taxes  ............................. 

28 

(87) 

239 

(85)   

1,342

Net loss .........................................................................  $ (22,233)  $ (23,564)  $ (10,653)  $ (13,260)  $ (15,667)

Basic net loss per common share:  ...............................  $

(0.59)  $

(0.63)  $

(0.29)  $

(0.38)  $

(0.49)

Diluted net loss per common share: .............................  $

(0.59)  $

(0.63)  $

(0.29)  $

(0.38)  $

(0.49)

Weighted average common shares 

Basic ....................................................................... 
Diluted  .................................................................... 

38,001 
38,001 

37,511 
37,511 

36,883 
36,883 

35,017 
35,017 

32,215
32,215

July 31, 
(in thousands)

Financial Position:

2010 

2009 

2008 

2007 

2006 

Working capital  .............................................................  $ 42,181  $ 60,518  $ 92,392  $ 113,850  $

80,161

Total assets  .................................................................. 

  115,245 

133,128 

154,522 

  159,002 

  101,524

Long term obligations  ................................................... 

— 

— 

— 

— 

—

Stockholders’ equity  ..................................................... 

97,016 

116,781 

138,289 

  141,894 

95,587

Notes to Selected Financial Data 

(1)  See Note 2 in the Notes to Consolidated Financial Statements regarding the acquisitions and cash paid for 

acquisitions in Fiscal 2009, 2008 and 2007.  

39

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion of our financial condition and results of operations should be read in conjunction with our 

financial statements and related notes. This discussion contains forward-looking statements that involve risks and 
uncertainties. Our actual results could differ materially from those anticipated in these forward-looking statements. See 
“Forward-Looking and Cautionary Statements”. Because of the foregoing factors, you should not rely on past financial 
results as an indication of future performance. We believe that period-to-period comparisons of our financial results to 
date are not necessarily meaningful and expect that our results of operations might fluctuate from period to period in the 
future.

The Company is a life sciences and biotechnology company focused on harnessing biological processes to 

develop research tools, diagnostics and therapeutics and on serving as a provider of diagnostic services to the medical 
community. Since our founding in 1976, our strategic focus has been on the development of enabling technologies in 
research, development, manufacture, licensing and marketing of innovative health care products, platforms and services 
based on molecular and cellular technologies. Our pioneering work in genomic analysis coupled with its extensive patent 
estate and enabling platforms have strategically positioned the Company to play an important role in the rapidly growing 
life sciences and molecular medicine marketplaces.  

We are comprised of three operating companies that have evolved out of our core competence: the use of nucleic 

acids as informational molecules and the use of compounds for immune modulation. These wholly owned operating 
companies conduct their operations through three reportable segments. Below are brief descriptions of each of the three 
operating segments (see Note 17 in the Notes to Consolidated Financial Statements):  

Enzo Life Sciences is a company that manufactures, develops and markets functional biology and cellular 

biochemistry products and tools to research and pharmaceutical customers world-wide and has amassed a large patent 
and technology portfolio. Enzo Life Sciences, Inc. is a recognized leader in labeling and detection technologies across 
research and diagnostic markets. Our portfolio of proteins, antibodies, peptides, small molecules, labeling probes, dyes 
and kits provides life science researchers tools for target identification/validation, high content analysis, gene expression 
analysis, nucleic acid detection, protein biochemistry and detection, and cellular analysis. We are internationally 
recognized and acknowledged as a leader in manufacturing, in-licensing, and commercialization of over 9,000 of our own 
products and in addition distribute over 30,000 products made by over 40 other original manufacturers. Our strategic 
focus is directed to innovative high quality research reagents and kits in the primary key research areas of protein 
homeostasis, epigenetics, live cell analysis, molecular biology and immunoassays. The segment is an established source 
for a comprehensive panel of products to scientific experts in the fields of Natural Products/Antibiotics, Autophagy, 
Cancer, Cell Cycle, Cell Death, Cell Signaling, Cellular Analysis, Endocrinology/Hormones, DNA regulation, Compound 
Screening, Genomics/Molecular Biology, GPCRs, Immunology, Inflammation, Metabolism, Neuroscience, Nitric Oxide 
pathway, Obesity/Adipokines, Oxidative Stress, Proteases and Proteosomes, Protein Expression and modification, Signal 
Transduction, Stress/Heat Shock proteins and Ubiquitin/Ubl signaling.  

Enzo Clinical Labs is a regional clinical laboratory serving the greater New York, New Jersey and Eastern 

Pennsylvania medical communities. The Company believes having clinical diagnostic services allows us to capitalize 
firsthand on our extensive advanced molecular and cytogenetic capabilities and the broader trends in predictive and 
personalized diagnostics. We offer a menu of routine and esoteric clinical laboratory tests or procedures used in general 
patient care by physicians to establish or support a diagnosis, monitor treatment or medication, or search for an otherwise 
undiagnosed condition. We operate a full-service clinical laboratory in Farmingdale, New York, a network of 30 patient 
service centers throughout greater New York, New Jersey and Eastern Pennsylvania, a stand alone “stat” or rapid 
response laboratory in New York City, and a full-service phlebotomy and logistics department. Payments for clinical 
laboratory testing services are made by the Medicare program, healthcare insurers and patients.  

Enzo Therapeutics is a biopharmaceutical company that has developed multiple novel approaches in the areas 
of gastrointestinal, infectious, ophthalmic and metabolic diseases, many of which are derived from the pioneering work of 
Enzo Life Sciences. The Company has focused its efforts on developing treatment regimens for diseases and conditions 
in which current treatment options are ineffective, costly, and/or cause unwanted side effects. This focus has generated a 
clinical and preclinical pipeline, as well as more than 40 patents and patent applications.  

40

The following table summarizes the sources of revenues for the fiscal years ended July 31, 2010, 2009 and 2008, 

(in $000’s and percentages):  

Fiscal year ended July 31,

2010 

2009

2008

Product revenues ...........................  $ 43,111 
9,793 
Royalty and license fee income ..... 
  44,178 
Clinical laboratory services ............ 

44% $
10 
46 

40,592 
9,376 
39,604 

45%  $ 28,087 
7,630 
11 
  42,078 
44 

36%
10 
54 

Total ...............................................  $ 97,082 

100% $

89,572 

100%  $ 77,795 

100%

Recent Events

In September 2010, the Company announced that it had streamlined its operations, which is expected to result in 
a reduction in annualized operating expenses beginning in the fiscal 2011 first quarter. These initiatives are also expected 
to result in increased gross margins. The operating cost reductions affect all of its operating businesses as well as 
corporate overhead. The overall improvements are primarily a result of streamlining operations at Enzo Life Sciences, 
where the Company completed a series of acquisitions over the past three years, and Enzo Clinical Labs, where Enzo 
has invested significantly over the past year in technology and process improvements.  

At Enzo Clinical Labs, the Company expects gross margin improvements and expense reductions, primarily 
through selective work force rationalization and process improvements, including customer service and billing designed to 
reduce processing and collection costs of receivables, improved laboratory service operations and lower reagent costs. At 
Enzo Life Sciences, as a result of the acquisitions that the Company has completed, certain operations have become 
redundant, which provided opportunities to reduce costs through realignment or centralization of R&D, customer service 
and manufacturing activities. Enzo Life Sciences has also undertaken a repositioning of its product offerings, refocusing 
its marketing efforts on higher-margin, higher volume products. As a result, the Company recorded a charge in the fiscal 
2010 fourth quarter of $1.3 million as certain low-volume products were rationalized. Enzo expects the benefits of the 
operational improvements to occur commencing with the Company’s fiscal 2011 first quarter ending October 31, 2010. In 
connection with the streamlining, the Company also recorded a one-time charge of approximately $500,000 in its fiscal 
2010 fourth quarter to reflect severance payments to terminated employees.  

Assay Designs, Inc.

On March 12, 2009, Enzo Life Sciences, Inc. and Enzo Life Sciences Acquisition, Inc., a newly formed wholly 

owned subsidiary of Enzo Life Sciences, Inc. (“Acquisition Sub”), entered into an asset purchase agreement (“Purchase 
Agreement”) dated as of March 12, 2009 with Assay Designs, Inc. (“Assay Designs”). Assay Designs, a privately owned 
company with annual sales of approximately $11 million, was engaged in researching, developing, manufacturing, 
distributing, marketing and selling specialty immunological and biochemical protein detection kits, assays, reagents, 
antibodies, recombinant proteins and related products and providing related services for use in the biotechnology, 
pharmaceutical and life sciences research industries (“Business”). Under the terms of the Purchase Agreement, 
Acquisition Sub purchased from Assay Designs substantially all of its assets, including trade accounts receivable, 
inventory, fixed assets, and intellectual property, used in or related to the Business and assumed certain of Assay 
Designs’ liabilities, including trade accounts payable, capital lease obligations and certain other current liabilities.  

The execution of the Purchase Agreement and the closing of the transaction occurred simultaneously on March 

12, 2009. The purchase price consisted of $12,228,000 in cash, exclusive of acquisition costs of approximately $540,000, 
and was subject to an upward or downward post-closing purchase price adjustment based on Assay Designs’ working 
capital as of the closing date and $328,000 representing estimated costs to consolidate an acquired facility and 
involuntary termination of certain employees. At the closing, $100,000 was held in escrow to secure the payment of any 
downward post-closing purchase price adjustment and $750,000 was held in escrow for 12 months to secure the payment 
of any indemnification obligations of Assay Designs under the Purchase Agreement. The acquisition was funded with the 
Company’s cash. Effective March 12, 2009, Assay Designs became a wholly-owned subsidiary of Enzo Life Sciences. 
The Assay Design acquisition strengthens the Company’s position as a global provider of life sciences reagents by 
broadening our product offerings and manufacturing capabilities. The consolidated financial statements include the results 
of operations for Assay Designs from the date of acquisition.  

Subsequent to the acquisition date, the Company paid $270,000 in additional purchase price in connection with 

the working capital adjustment and released the $100,000 and $750,000 escrow amounts.  

41

  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
Results of Operations 

Comparative Financial Data for the Fiscal Years Ended July 31,
(in 000’s) 

2010

2009

Increase
(Decrease)

% Change

Revenues: 
Product revenues .............................................................. 
Royalty and license fee income ........................................ 
Clinical laboratory services ............................................... 

$

Total revenues................................................................... 

$

43,111 
9,793 
44,178 

97,082 

$

40,592 
9,376 
39,604 

89,572 

2,519 
417 
4,574 

7,510 

Operating expenses: 
Cost of product revenues .................................................. 
Cost of clinical laboratory services.................................... 
Research and development .............................................. 
Selling, general, and administrative .................................. 
Provision for uncollectible accounts receivable ................ 
Legal.................................................................................. 
Litigation settlement and related legal costs ..................... 
Total operating expenses.................................................. 

22,547 
29,570 
9,704 
48,395 
3,480 
1,746 
3,698 
119,140 

26,766 
26,295 
9,220 
41,314 
5,189 
4,195 
— 
112,979 

(4,219) 
3,275 
484 
7,081 
(1,709) 
(2,449) 
3,698 
6,161 

Operating loss ................................................................... 

(22,058) 

(23,407) 

1,349 

Other income (expense): 
Interest .............................................................................. 
Other ................................................................................. 
Foreign currency ............................................................... 

19 
44 
(266) 

581 
74 
(725) 

(562) 
(30) 
459 

Loss before income taxes ................................................. 

$

(22,261)  $

(23,477)  $

1,216 

6 
4 
12 

8 

(16)
12 
5 
17 
(33)
(58)
— 
5.5 

(6)

(97)
(41)
(63)

(5)

Fiscal 2010 compared to Fiscal 2009

Consolidated Results:

The “2010 period” and the “2009 period” refer to the fiscal years ended July 31, 2010 and 2009, respectively. The 
2010 period includes the twelve months results of ADI which was acquired on March 12, 2009. The 2009 period includes 
the results of ADI from March 12, 2009 to July 31, 2009.  

Product revenues increased overall by $2.5 million in the 2010 period to $43.1 million as compared to the 2009 

period. Acquisition growth from the acquired ADI business was $6.5 million or 16% which was partially offset by a net 
organic decline of $4.4 million or 11% due to a $5.2 million decline in low margin, third-party distribution business. Our 
core product revenues demonstrated organic growth of $0.8 million or 2%. Foreign currency fluctuation positively affected 
revenues by $0.4 million or 1%.  

Royalty and license fee income during the 2010 period was $9.8 million compared to $9.4 million in the 2009 

period, an increase of $0.4 million or 4%. Royalties are primarily earned from the reported net sales of Qiagen products 
subject to a license agreement and from a license agreement with Abbott. During the 2010 and 2009 periods, the 
Company recognized royalties of approximately $6.8 million and $6.7 million, respectively from Qiagen and royalties and 
license fees under the Abbott License Agreement of approximately $3.0 million and $2.7 million respectively, an increase 
of $0.3 million in the 2010 period. There are no direct expenses relating to royalty and license fee income.  

Clinical laboratory revenues during the 2010 period were $44.2 million compared to $39.6 million in the 2009 

period. The 2010 period’s increase over the 2009 period was $4.6 million or 12%. During the 2010 period, revenue 
increased due to organic growth of 5.4% after giving consideration to the 2009 period contractual adjustment of $2.3 
million.

42

 
 
  
 
  
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
  
 
  
 
  
 
  
 
 
 
  
  
  
  
 
The 2010 increase resulted from increased service volume, including higher priced testing volume, despite a 

noted general slowdown in physician office visits due to the slowed economy and a 1.9% decrease in Medicare 
reimbursement rates effective January 1, 2010. During the 2009 period, revenues were negatively affected by contractual 
adjustments of $2.3 million. These immaterial contractual adjustments in 2009 related to computational errors that 
affected the calculated expected reimbursement rate in fiscal 2008, and for periods prior to August 1, 2008 for the majority 
of payers, and credits issued which were not accrued for timely.  

The cost of product revenues during the 2010 period was $22.5 million compared to $26.7 million in the 2009 

period, a decrease of $4.2 million or 16%. The decrease is primarily due to the impact of $4.7 million in lower costs from 
low margin third-party distribution business, reduced fair value accounting adjustments of $1.8 million in accordance with 
purchase accounting rules and reclassification of $1.6 million in costs relating to the realignment of manufacturing facilities
and personnel. Such decreases in 2010 were partially offset by product cost relating to ADI of $2.8 million, by the cost of 
sales from organic growth, and $1.0 million of higher inventory reserves for excess and obsolete inventory due primarily to 
a strategic realignment of marketing efforts for core products. We believe that cost of product revenues for future periods 
will be affected by, among other things, competitive conditions and foreign currency rates.  

The cost of clinical laboratory services during the 2010 period was $29.6 million as compared to $26.3 million in 

the 2009 period, an increase of $3.3 million or 12%. The Company incurred increased costs due to increased reagent 
costs and supplies of $1.3 million, laboratory personnel and related costs of $1.6 million and outside reference lab costs of 
$0.4 million, partially due to increased service volumes. Laboratory personnel and related costs increased primarily due to 
additional headcounts in phlebotomists to expand patient collection sites and other personnel to manage expanded 
operations.  

Research and development expenses were approximately $9.7 million during the 2010 period, compared to $9.2 

million in the 2009 period, an increase of $0.5 million or 5%. The increase was principally attributed to higher costs of $1.4 
million at Enzo Life Sciences primarily related to Assay Designs offset by $0.9 million in lower clinical trial and related 
activities and payroll costs at the Therapeutics segment.  

Selling, general and administrative expenses were approximately $48.4 million during the 2010 period as 
compared to $41.3 million in the 2009 period, an increase of $7.1 million or 17%. The increase was primarily due to the 
net increase at the Enzo Life Sciences segment of $5.4 million in the 2010 period which included approximately $2.3 
million of selling, general and administrative expenses related to Assay Designs operations, the impact of realigning 
manufacturing facilities and certain personnel of $1.6 million, $1.1 million in payroll and benefit costs, and increased 
depreciation and amortization of $0.7 million, which were offset by a decrease in marketing costs of $0.3 million. The 
Clinical Lab segment’s selling general and administrative increased $3.1 million primarily due to increased payroll and 
related benefits of $2.2 million attributed to increases in headcounts in our sales force and management personnel 
partially related to increased service volume and the marketing and development of esoteric and gene based testing 
capabilities, information technology costs of $0.2 million, and other overhead expenses of $0.7 million. These increases 
were offset by a decrease in the Other segment’s selling general and administrative of approximately $1.4 million, 
primarily due to decreases in professional fees of $0.3 million, outside consulting costs of $0.7 million, payroll and payroll 
related costs of $0.2 million, and other operating cost of $0.2 million.  

The provision for uncollectible accounts receivable, primarily relating to the Clinical Labs segment was $3.5 

million for the 2010 period as compared to $5.2 million in the 2009 period, a decrease of $1.7 million or 33%. The 
decrease is attributed to a charge in 2009 attributed to increased provisions for the Clinical Labs legacy billing system, 
which was replaced in August 2008, due to reduced collection efforts relating to the legacy billing system, the correction of 
an immaterial error relating to fiscal 2008, and increased provisions required based on changes in payer mix, offset by a 
reduced requirement under the new billing system.  

Legal expense was $1.7 million during the 2010 period compared to $4.2 million in the 2009 period, a decrease of 

$2.5 million, due to overall reduction in legal services provided relating to certain patent litigation matters and general 
matters of $2.1 million, the reimbursement of $0.5 million in legal costs under our insurance policy, reductions in fees due 
to negotiated fee settlements and other adjustments of $0.5 million offset by approximately $0.6 million in incremental 
legal costs incurred for proxy related costs for the January 2010 annual meeting.  

In connection with the litigation settlement with Mr. Shahram K. Rabbani to settle all of his claims against the 
Company, and certain of its executive officers, the Company paid a lump sum payment of $2.7 million. The Company 
recorded a settlement expense of approximately $3.7 million in the fiscal quarter ending January 31, 2010, consisting of 
the lump sum payment of $2.7 million and approximately $1.0 million of legal expenses incurred in connection with the 
claims (See Note 16 in Notes to Consolidated Financial Statements).  

43

Interest income was $19,000 during the 2010 period as compared to $0.6 million during the 2009 period. The 

interest income decrease during the 2010 period is attributed to the decline in interest rates. Furthermore, the Company 
had higher average invested balances during the 2009 period. The Company earns interest by investing in short term U.S. 
Treasury bills and money market accounts.  

The loss on foreign currency was $0.3 million during the 2010 period, due to a $0.1 million non-cash loss on an 

intercompany term loan denominated in British pounds sterling and the fluctuations of other foreign currencies relative to 
the US dollar during the period and the impact that had on settled transactions during the period. During the 2009 period, 
the loss on foreign currency transactions was $0.7 million primarily due to a non-cash loss on the intercompany term loan 
denominated in British pounds sterling. The British currency depreciated more significantly against the US dollar during 
the 2009 period than in the 2010 period.  

The Company’s effective income tax rate benefit (provision) for the 2010 period was 0.1% compared to (0.4%) 
during the 2009 period. The tax benefit (provision) for the 2010 and 2009 periods were based on state and local taxes, 
domestic and foreign tax for tax deductible goodwill and indefinite lived intangibles, and book to tax differences for 
acquired inventory and differed from the expected net operating loss carry forward benefit at the U.S. federal statutory 
rate of 34% primarily due to the inability to recognize such benefit. The carry forward benefit cannot be recognized 
because of uncertainties relating to future taxable income, in terms of both its timing and its sufficiency. In the 2010 
period, the Company recognized a benefit of $0.1 million primarily as a result of the expiration of the statute of limitations 
for an uncertain tax position.  

Segment Results 

The Life Sciences segment’s income before taxes was $2.9 million for the 2010 period as compared to $1.7 

million for the 2009 period. Product revenues increased by $2.5 million in the 2010 period primarily due to the contribution 
of product revenues from the March 2009 acquisition of Assay Designs and organic growth from our core products which 
replaced low margin, high volume distribution product revenues principally to one customer. Royalty and license fee 
income increased $0.4 million from the Qiagen agreement and the Abbott license agreement. The segment’s gross 
margin of $30.4 million increased by $7.2 million in 2010. Gross profit margins increased to 57% from 47% due to 
favorable impact from ADI’s higher margin, which replaced lower margin revenue in 2009, lower inventory fair value 
adjustments and realignment of personnel from manufacturing to trading activity. The segment’s other operating 
expenses, including selling, general and administrative, legal and research and development, increased by approximately 
$6.4 million during the 2010 period primarily due to the inclusion of Assay Designs expenses of $3.3 million, the impact of 
the aforementioned realignment of personnel of payroll and related costs of $1.6 million, increased payroll and other costs 
of $1.2 million, and depreciation and amortization of $0.7 million, offset by lower legal costs of $0.3 million and lower 
marketing costs of $0.3 million. The segment experienced a foreign currency loss of $0.3 million during the 2010 period 
resulting from the impact that fluctuations in foreign currencies had on settled transactions and on an intercompany loan 
denominated in pounds sterling. In aggregate, the inventory fair value adjustment and amortization of intangibles 
negatively impacted the segment operating results in the 2010 period by $1.9 million.  

The Clinical Laboratory segment’s loss before taxes was $7.5 million for the 2010 period as compared to a loss of 

$7.3 million in the 2009 period. The revenue from laboratory services increased in the 2010 period by $4.6 million due to 
increased service volume, despite a general slowdown in physician office visits since the fiscal third quarter, a decrease in 
Medicare reimbursement rates effective January 1, 2010 and during the 2009 period revenues were negatively impacted 
by contractual adjustments of $2.3 million. The 2010 period gross profit of $14.6 million increased $1.3 million over the 
2009 period due to service volume increases, offset by increased headcount and other costs to perform increased testing, 
and the impact the aforementioned $2.3 million contractual adjustment had on the 2009 period gross profit. In the 2010 
period, the selling, general and administrative and legal costs increased by approximately $3.2 million primarily due to 
increases in payroll and payroll related costs of $2.2 million attributed to increases in headcount in our sales force and 
management personnel partially related to increased service volume and the marketing and development of esoteric and 
gene-based testing capabilities, information technology costs of $0.2 million, and other operating costs of $0.7 million. The 
provision for uncollectible accounts receivables decreased by $1.8 million as compared to the 2009 period. During the 
2009 period, the Company recorded a charge attributed to increased provisions for the Clinical Labs legacy billing system, 
which was replaced in August 2008, due to reduced collection efforts relating to the legacy billing system and the 
correction of an immaterial error relating to fiscal 2008.  

The Therapeutics segment’s loss before income taxes was approximately $2.5 million for the 2010 period as 

compared to a loss of $3.4 million for the 2009 period. The decrease in the segment loss of $0.9 million was primarily due 
to decreases in clinical trial activities of $0.6 million and decreases in salaries and related costs of $0.3 million.

44

The Other segment’s loss before taxes for the 2010 period was approximately $15.1 million as compared to $14.5 

million in the 2009 period, an increase of $0.6 million. The Other segment’s 2010 period loss reflects the litigation 
settlement of $3.7 million, offset by a decrease in professional fees, consulting costs and public relations expenses of $1.0 
million, payroll and payroll related costs of $0.2 million, and $0.3 million in other costs. Legal expenses decreased $2.1 
million due to the reimbursement of $0.5 million in legal fees; reduced services provided relating to certain patent litigation
activity and general matters of $1.7 million and reductions in fees recorded due to negotiated fee settlements and other 
adjustments of $0.5 million offset by $0.6 million incremental legal costs incurred for proxy related matters in 2010. 
Interest income declined $0.5 million due to the decline in interest rates. The Company earns interest by investing in short 
term U.S. Treasury bills and money market accounts. 

45

Results of Operations  

Comparative Financial Data for the Fiscal Years Ended July 31, 
(in 000’s) 

2009

2008

Increase
(Decrease)

% Change

Revenues: 
Product revenues ...................................................................... 
Royalty and license fee income ................................................ 
Clinical laboratory services ....................................................... 
Total revenues........................................................................... 

$

40,592 
9,376 
39,604 
89,572 

$

28,087 
7,630 
42,078 
77,795 

$

12,505 
1,746 
(2,474) 
11,777 

Operating expenses: 
Cost of product revenues .......................................................... 
Cost of clinical laboratory services............................................ 
Research and development ...................................................... 
Selling, general, and administrative .......................................... 
Provision for uncollectible accounts receivable ........................ 
Legal.......................................................................................... 
Total operating expenses.......................................................... 

26,766 
26,295 
9,220 
41,314 
5,189 
4,195 
112,979 

19,159 
22,209 
8,637 
33,272 
3,716 
5,588 
92,581 

7,607 
4,086 
583 
8,042 
1,473 
(1,393) 
20,398 

Operating loss ........................................................................... 

(23,407) 

(14,786) 

(8,621) 

Other income (expense): 
Interest ...................................................................................... 
Other ......................................................................................... 
Foreign currency ....................................................................... 
Loss before income taxes ......................................................... 

Fiscal 2009 compared to Fiscal 2008

Consolidated Results: 

581 
74 
(725) 

(3,115) 
(97) 
(752) 
$ (23,477)  $ (10,892)  $ (12,585) 

3,696 
171 
27 

45 
23 
(6)
15 

40 
18 
7 
24 
40 
(25)
22 

58 

(84)
(57)
— 
116 

The “2009 period” and the “2008 period” refer to the fiscal years ended July 31, 2009 and 2008, respectively. The 
2009 period includes the full year results of Biomol which was acquired on May 8, 2008 and the results of Assay Designs 
from March 12, 2009, the date of acquisition, to July 31, 2009.  

Product revenues during the 2009 period were $40.6 million compared to $28.1 million in the 2008 period, an 

increase of $12.5 million or 45%. Acquisition growth represented $12.1 million or a 43% increase over product revenues 
in the 2008 period, primarily from Biomol and Assay Designs, $1.4 million or 5% was from organic growth, offset by $1.0 
million or 4% negative effect from foreign currency.  

Royalty and license fee income during the 2009 period was $9.4 million compared to $7.6 million in the 2008 

period, an increase of $1.7 million or 23%. Royalties are primarily earned from net sales of Qiagen products subject to a 
license and from a License Agreement with Abbott. During the 2009 period, the Company recognized royalties of 
approximately $6.7 million from Qiagen, an increase of approximately $1.2 million over the 2008 period, and royalties and 
license fees under the Abbott License Agreement of approximately $2.7 million, an increase of $0.5 million over the 2008 
period. There are no direct expenses relating to royalty and license fee income.  

Clinical laboratory revenues during the 2009 period were $39.6 million compared to $42.1 million in the 2008 

period, a decrease of $2.5 million or 6%. Revenues were adversely affected by contractual adjustments of $2.3 million. 
These immaterial adjustments related to computational errors that affected the calculated expected reimbursement rate in 
fiscal 2008, 2007 and 2006 and for periods prior to August 1, 2005 for the majority of payers and credits issued which 
were not accrued for timely. The reduced service volume was partially impacted by reduced billings on our legacy billing 
system in fiscal 2009, including the investigation of and rebilling of denials during the period, as a result of the realignment
of certain billing personnel to implement our new comprehensive billing and accounts receivable system.  

46

 
 
  
 
  
 
  
 
  
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
  
 
  
 
  
 
  
 
 
 
This new system was effective for all laboratory services performed after August 1, 2008. We believe that the new 

billing and accounts receivable system enhances our billing and collection process. 

The cost of product revenues during the 2009 period was $26.8 million compared to $19.2 million in the 2008 

period, an increase of $7.6 million or 40%. The increase is principally due to the inclusion of Biomol and Assay Designs 
cost of product revenues of approximately $7.4 million in the 2009 period, which includes the impact of an inventory fair 
value adjustment of $2.2 million related to sales of inventory acquired from Biomol and Assay Designs. 

The cost of clinical laboratory services during the 2009 period was $26.3 million as compared to $22.2 million in 
the prior period, an increase of $4.1 million or 18%. The Company incurred increased costs primarily relating to reagent 
and supplies costs of $1.1 million, laboratory personnel costs of $1.8 million, and outside testing labs of $0.7 million, and 
other related lab costs of $0.5 million. Laboratory personnel costs increases resulted from additional headcounts in 
phlebotomists to expand patient collection sites and other personnel to manage expanded internal operations. 

Research and development expenses were approximately $9.2 million during the 2009 period compared to $8.6 

million in the 2008 period an increase of $0.6 million or 7%. Research and development costs increased $2.4 million at 
the Life Sciences segment, principally related to the inclusion of Biomol and Assay Designs, offset by a decrease at the 
Therapeutic segment of $1.8 million due to a decrease in clinical trial activities.  

Selling, general and administrative expenses were approximately $41.3 million during the 2009 period as 

compared to $33.3 million in the 2008 period, an increase of $8.0 million or 24%. Life Sciences selling, general and 
administrative costs increased by $5.2 million over the 2008 period, which principally related to the inclusion of Biomol 
and Assays Designs. The increase in the Company’s other segments’ selling, general and administrative expenses of 
approximately $2.9 million was primarily due to payroll and related personnel costs approximating $0.5 million, consulting 
and professional fees of $1.2 million, other overhead costs of $1.0 million and information technology costs of $0.3 million. 

The provision for uncollectible accounts receivable, primarily relating to the Clinical Labs segment, was $5.2 

million for the 2009 period as compared to $3.7 million in the 2008 period. The increase in the 2009 period of $1.5 million 
or 40% was attributed to 1) increased provisions for the Clinical Labs legacy billing system, which was replaced in August 
2008, due to reduced collection efforts relating to the legacy billing system, 2) the correction of the immaterial $0.6 million
error in the allowance for doubtful accounts determined relating to 2008, and 3) increased provisions required based on 
changes in payer mix. Outstanding receivables, which are fully reserved, will remain on the legacy system until the earlier 
of: all invoices are collected, all collection efforts are exhausted, or all invoices are written off in accordance with our 
critical accounting policy. 

Legal expense was $4.2 million during the 2009 period compared to $5.6 million in the 2008 period, a decrease of 

$1.4 million or 25%, primarily due to a decrease in patent litigation activity in the current period of $2.6 million offset by 
increases in the Life Science segment of $0.2 million for realignment of existing and establishment of new global 
operating units and increases in other legal costs of $1.0 million. 

Interest income decreased by $3.1 million or 84% to $0.6 million during the 2009 period compared to $3.7 million 
during the 2008 period. Interest income decreased during the 2009 period due to the decline in interest rates in response 
to monetary policy actions taken by the U.S. Federal Reserve and lower invested balances. The Company earns interest 
by investing primarily in short term and liquid U.S. government instruments and money market accounts. 

Other income was $0.1 million during the 2009 period versus $0.2 million in the year ago period.  

The loss on foreign currency was $0.7 million during the 2009 period. During the 2009 period, the Company’s Life 
Sciences segment incurred a non-cash foreign currency loss of approximately $0.7 million on an intercompany term loan 
denominated in pounds sterling due to the strengthening of the US dollar as at July 31, 2009 versus July 31, 2008.  

The Company’s effective income tax rate (provision) benefit for the 2009 period was (0.4%), compared to 2.2% 

during the 2008 period. The tax provision for both periods was based on state and local taxes and book to tax differences 
for inventory acquired from Biomol and differed from the expected net operating loss carry forward benefit at the U.S. 
federal statutory rate of 34% primarily due to the inability to recognize such benefit. The carry forward benefit cannot be 
recognized because of uncertainties relating to future taxable income, in terms of both its timing and its sufficiency. 

Segment Results 

The Life Sciences segment’s income before taxes was approximately $1.7 million for the 2009 period and $3.4 

million for the 2008 period. Revenues from product shipments increased by $12.5 million primarily due to the inclusion of 
products sales of $12.1 million from Biomol and Assay Designs in the 2009 period. Royalty and license fee income 
increased $1.7 million primarily from the existing Qiagen and Abbott licensing and royalty agreements.  

47

The segment’s gross margin of $23.2 million increased $6.6 over the prior year period, after being negatively 

impacted by a $2.2 million fair value adjustment attributed to the sale of inventory acquired from Biomol and Assay 
Designs. Segment operating expenses, including selling, general and administrative and legal of $14.9 million and 
research and development of $5.9 million, increased by approximately $7.5 million during the 2009 period primarily due to 
the inclusion of Biomol and Assay Designs expenses of $7.5 million. The 2009 expenses include amortization of 
intangibles of $1.2 million, $0.4 million in legal costs to establish new and realign existing global entities, and marketing 
costs of $0.2 million relating to the integration of our brands. The segment experienced a non-cash foreign currency loss 
of $0.7 million resulting from an intercompany loan denominated in pounds sterling. In aggregate, the inventory fair value 
adjustment, amortization of intangibles, the one-time legal and marketing costs and the non-cash foreign currency loss, 
negatively impacted the segment operating results by $4.7 million. 

The Clinical Labs segment’s loss before taxes was $7.3 million for the 2009 period as compared to income before 

taxes of $2.0 million in the 2008 period. The 2009 results were negatively impacted by lower service volume of $2.5 
million partially due to a charge of $2.3 million relating to contractual adjustments discussed above. The decrease in the 
2009 period’s gross margin of $6.6 million was due to the decreased service revenues, change in fiscal 2009 payer mix 
and increased cost of laboratory services. Selling, general and administrative increased approximately $1.1 million 
primarily due to increases in office support salaries and operational costs to maintain the facility. The provision for 
uncollectible accounts increased by $1.5 million primarily due to an increased provision related to the legacy billing 
system and the correction of the previously noted immaterial error $0.6 million in the allowance for doubtful accounts 
related to fiscal 2008. The segment earned interest in the 2009 period of $0.1 million and $0.2 million in the 2008 period. 

The Therapeutics segment’s loss before income taxes was approximately $3.4 million for the 2009 period as 
compared to a loss of $5.1 million for the 2008 period. The decrease in the loss of $1.7 million was primarily due to a 
decrease in clinical trial activities of $1.8 million offset by a non-recurring government grant of $0.1 million which was 
recognized in the 2008 period.  

The Other segment’s loss before taxes for the 2009 period was approximately $14.6 million compared to $11.3 

million in the 2008 period, an increase of $3.3 million. Selling, general, and administrative and legal increased by $0.3 
million as the result of a $1.6 million decrease in legal expenses due to decreased patent litigation activity, partially offset
by increases in professional and consulting fees of $1.2 million, and payroll and related costs of $0.7 million. The 
decrease in interest income of $2.9 million due to the decline in interest rates and lower levels of cash available for 
investment.  

Liquidity and Capital Resources  

At July 31, 2010, the Company had cash and cash equivalents of $8.8 million and short-term investments of 

$24.8 million, or $33.6 million in aggregate as compared to $50.2 million at July 31, 2009. Short term investments are in 
US Treasury bills. The Company had working capital of $42.2 million at July 31, 2010 compared to $60.5 million at July 
31, 2009. The decrease in working capital of $18.3 million was primarily the result of the 2010 period net loss, which 
included the litigation settlement to a former officer and related legal costs of $3.7 million, and funding for capital 
expenditures of $3.3 million. 

Net cash used in operating activities for the year ended July 31, 2010 was approximately $13.5 million as 

compared to $11.5 million for the year ended July 31, 2009. The increase in net cash used in operating activities in the 
2010 period over the 2009 period of approximately $2.0 million was primarily due to a decrease in changes in operating 
assets and liabilities of $3.0 million, relating primarily to increases in accounts receivable and inventory, offset by an 
increase in accounts payable – trade, and the effect of lower non-cash adjustments in the 2010 period over the 2009 
period of $0.3 million, partially offset by the decrease in the period net loss of $1.3 million.  

Net cash provided by investing activities was approximately $15.3 million as compared to a use of cash of $60.2 
million in the year ago period. The change from 2009 to 2010 of $75.5 million is primarily due to the net increase in short 
term investments in US Treasury bills of $43.3 million in 2009 as compared to a decrease due to net maturities of short-
term investments of $18.5 million in 2010 and cash used in acquisitions of $14.5 million in the 2009 period. In the 2010 
and the 2009 periods cash used for capital expenditures was $3.3 million and $2.7 million, respectively.  

There were no financing activities in 2010. Net cash provided by financing activities was approximately $0.3 

million in the 2009 period, attributed primarily to stock option exercise proceeds. There were no stock option exercises in 
the 2010 period.  

We believe that our current cash and cash equivalents are sufficient for our foreseeable liquidity and capital 

resource needs, including any requirement to satisfy the earnout relating to the Biomol International acquisition which is 
currently in dispute (See Notes 2 and 16 to the Consolidated Financial Statements) over the next twelve months, although 
there can be no assurance that future events will not alter such view.

48

Effect of New Accounting Pronouncements

In October 2009, the FASB issued a Consensus of the FASB Emerging Issues Task Force relating to Multiple 

Deliverable Revenue Arrangements. This standard provides application guidance on whether multiple deliverables exist, 
how the deliverables should be separated and how the consideration should be allocated to one or more units of 
accounting. This update establishes a selling price hierarchy for determining the selling price of a deliverable. The selling 
price used for each deliverable will be based on vendor-specific objective evidence, if available, third-party evidence if 
vendor-specific objective evidence is not available, or estimated selling price if neither vendor-specific or third-party 
evidence is available. This guidance is effective for revenue arrangements entered into or materially modified in fiscal 
years beginning on or after June 15, 2010. Early adoption is permitted. The Company will adopt this guidance effective 
August 1, 2010. The Company has assessed the impact of adoption and it is not expected to have a material effect on our 
consolidated results of operations and financial condition. 

In August 2009, the Company adopted the provisions of the accounting standard on fair value measurements that 

apply to nonfinancial assets and liabilities that are recognized or disclosed at fair value on a non-recurring basis. The 
adoption of these provisions did not have an impact on the consolidated financial statements or disclosures.  

In June 2009, the FASB issued authoritative guidance to establish the FASB Accounting Standards Codification 
as the source of authoritative accounting principles and the framework for selecting the principles used in the preparation 
of financial statements of nongovernmental entities that are presented in conformity with generally accepted accounting 
principles in the United States. This guidance only impacted references for accounting guidance.  

On August 1, 2009, the Company adopted the revised authoritative guidance on business combinations which 

changed existing practice, in part, as follows: (1) contingent consideration arrangements are now fair valued at the 
acquisition date and included on that basis in the purchase price consideration; (2) transaction costs are now expensed as 
incurred, rather than capitalized as part of the purchase price; (3) reversal of valuation allowances created in purchase 
accounting are now recorded through the income tax provision; and (4) in order to accrue for a restructuring plan in 
purchase accounting, all authoritative guidance would have to be met at the acquisition date. While the adoption of this 
standard did not have a material impact on the Company’s financial statements, it could materially change the accounting 
for business combinations consummated in the future and for tax matters relating to prior acquisitions settled subsequent 
to July 31, 2009.  

Contractual Obligations

The Company has entered into various real estate and equipment operating leases and has employment 
agreements with certain executive officers. The real estate lease for the Company’s Farmingdale Clinical Lab and 
Research facility is with a related party. See Item 2, Properties, and Note 15 to the Consolidated Financial Statements for 
a further description of these various leases.  

The following is a summary of future payments under the Company’s contractual obligations as of July 31, 2010:  

Payments Due by Period

In 000’s
Real estate and equipment leases.................... 
Employment agreements .................................. 
Total contractual cash obligations..................... 

Total
23,838 
2,741 
26,579 

$

$

Less than
1 year
4,718 
1,530 
6,248 

$

$

1-3 years
7,107 
1,211 
8,318 

$

$

4-5 years
5,373 
— 
5,373 

$

$

Management is not aware of any material claims, disputes or settled matters concerning third-party 

reimbursements that would have a material effect on our financial statements.  

Over 5 years
6,640 
— 
6,640 

$

$

The Company does not have any “off-balance sheet arrangements” as such term is defined in Item 303(a) (4) of 

Regulation S-K.

49

  
 
 
 
 
 
 
 
Critical Accounting Policies 

General

The Company’s discussion and analysis of its financial condition and results of operations are based upon Enzo 

Biochem, Inc. consolidated financial statements, which have been prepared in accordance with accounting principles 
generally accepted in the United States. The preparation of these financial statements requires the Company to make 
estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses; these estimates 
and judgments also affect related disclosure of contingent assets and liabilities.  

On an on-going basis, we evaluate our estimates, including those related to contractual expense, allowance for 
uncollectible accounts, inventory, intangible assets and income taxes. The Company bases its estimates on experience 
and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form 
the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other 
sources. Actual results may differ from these estimates under different assumptions or conditions.  

Product revenues

Revenues from product sales are recognized when the products are shipped and title transfers, the sales price is 

fixed or determinable and collectibility is reasonably assured. 

Royalties

Royalty revenues are recorded in the period earned. Royalties received in advance of being earned are recorded 

as deferred revenues. 

License fees and multiple element arrangements

When evaluating multiple element arrangements, the Company considers whether the components of the 

arrangement represent separate units of accounting. The evaluation requires subjective determinations and requires 
management to make judgments about the fair value of the individual elements and whether such elements are separable 
from the other aspects of the contractual relationship. License fees received in advance of being earned are recorded as 
deferred revenues. 

Revenues - Clinical laboratory services

Revenues from the Clinical Labs segment are recognized upon completion of the testing process for a specific 

patient and reported to the ordering physician. These revenues and the associated accounts receivable are based on 
gross amounts billed or billable for services rendered, net of a contractual adjustment, which is the difference between 
amounts billed to payers and the expected approved reimbursable settlements from such payers.  

The following table represents the clinical laboratory segment’s net revenues and percentages by revenue 

category:  

Revenue category
Medicare...................................... 
Third-party payers ....................... 
Patient self-pay ........................... 
HMO’s ......................................... 
Total ............................................ 

Year ended July 31 
2010

Year ended July 31 
2009

Year ended July 31 
2008

(In 000’s)

(in %)

(In 000’s)

(in %)

(In 000’s)

(in %)

$

$

11,158 
19,534 
8,758 
4,728 
44,178 

$

25 
44 
20 
11 

100%  $

9,138 
20,073 
6,056 
4,337 
39,604 

$

23 
51 
15 
11 

100%  $

9,078 
24,768 
3,582 
4,650 
42,078 

22 
59 
8 
11 
100%

The Company provides services to certain patients covered by various third-party payers, including the Federal Medicare 
program. Laws and regulations governing Medicare are complex and subject to interpretation for which action for 
noncompliance includes fines, penalties and exclusion from the Medicare programs. The Company believes that it is in 
compliance with all applicable laws and regulations and is not aware of any pending or threatened investigations involving 
allegations of potential wrongdoing.  

Other than the Medicare program, one provider whose programs are included in the Third-party payer and Health 
Maintenance Organizations (“HMO’s”) categories represented 25%, 25%, and 26% of the Clinical Labs segment’s 
services net revenues for the fiscal years ended July 31, 2010, 2009 and 2008 respectively.  

50

 
 
 
    
 
 
 
 
 
 
 
 
 
Contractual Adjustment

The Company’s estimate of contractual adjustment is based on significant assumptions and judgments, such as 
its interpretation of payer reimbursement policies, and bears the risk of change. The estimation process is based on the 
experience of amounts approved as reimbursable and ultimately settled by payers, versus the corresponding gross 
amount billed to the respective payers. The contractual adjustment is an estimate that reduces gross revenue, based on 
gross billing rates, to amounts expected to be approved and reimbursed. Gross billings are based on a standard fee 
schedule we set for all third party payers, including Medicare, health maintenance organizations (“HMO’s) and managed 
care. The Company adjusts the contractual adjustment estimate quarterly, based on its evaluation of current and historical 
settlement experience with payers, industry reimbursement trends, and other relevant factors.  

The other relevant factors that affect our contractual adjustment include the monthly and quarterly review of: 1) 

current gross billings and receivables and reimbursement by payer, 2) current changes in third party arrangements. 3) the 
growth of in-network provider arrangements and managed care plans specific to our Company.  

Our clinical laboratory business is primarily dependent upon reimbursement from third-party payers, such as 

Medicare (which principally serves patients 65 and older) and insurers. We are subject to variances in reimbursement 
rates among different third-party payers, as well as constant changes of reimbursement rates. Changes that decrease 
reimbursement rates or coverage would negatively impact our revenues. The number of individuals covered under 
managed care contracts or other similar arrangements has grown over the past several years and may continue to grow 
in the future. In addition, Medicare and other government healthcare programs continue to shift to managed care. These 
trends will continue to reduce our revenues.  

During the years ended July 31, 2010, 2009 and 2008, the contractual adjustment percentages, determined using 

current and historical reimbursement statistics, were 83.0%, 80.8% and 81.8%, respectively, of gross billings. The 
Company believes a decline in reimbursement rates or a shift to managed care, or similar arrangements may be offset by 
the positive impact of an increase in the number of tests we perform. However, there can be no assurance that we can 
increase the number of tests we perform or that if we do increase the number of tests we perform, that we can maintain 
that higher number of tests performed, or that an increase in the number of tests we perform would result in increased 
revenue.  

The Company estimates (by using a sensitivity analysis) that each 1% point change in the contractual adjustment 
percentage could result in a change in clinical laboratory services revenues of approximately $2,589,000 and $2,040,000, 
for the years ended July 31, 2010 and 2009, respectively, and a change in the net accounts receivable of approximately 
$339,000 and $287,000 as of July 31, 2010 and 2009, respectively.  

Our clinical laboratory financial billing system records gross billings using a standard fee schedule for all payers 
and does not record contractual adjustment by payer at the time of billing. Therefore, we are unable to quantify the effect 
of contractual adjustment recorded during the current period that relate to revenue recorded in a previous period. 
However, we can reasonably estimate our monthly contractual adjustment to revenue on a timely basis based on our 
quarterly review process, which includes:  

•  

•  

•  

•  

an analysis of industry reimbursement trends; 

an evaluation of third-party reimbursement rates changes and changes in reimbursement arrangements 
with third-party payers;  

a rolling monthly analysis of current and historical claim settlement and reimbursement experience 
statistics with payers;  

an analysis of current gross billings and receivables by payer.  

Accounts Receivable and Allowance for Doubtful Accounts 

Accounts receivable are reported at realizable value, net of allowances for doubtful accounts, which is estimated 

and recorded in the period of the related revenue.  

The following is a table of the Company’s net accounts receivable by segment. The Clinical Labs segment’s net 

receivables are detailed by billing category and as a percent to its total net receivables. As of July 31, 2010 and 2009, 
approximately 45% and 40%, respectively, of the Company’s net accounts receivable relates to its Clinical Labs business, 
which operates in the New York, New Jersey and Eastern Pennsylvania medical communities. The Life Sciences 
segment’s accounts receivable, of which $1.9 million or 27% and $2.1 million or 28% represents foreign receivables as of 
July 31, 2010 and 2009 respectively, includes royalty receivables of $2.5 million, as of July 31, 2010 and 2009, of which 
approximately $1.8 million and $1.9 million, respectively is from Qiagen Corporation.  

51

Net accounts receivable 

Billing category
Clinical Labs 

As of 
July 31, 2010 

As of 
July 31, 2009 

(In 000’s)

(in %)

(In 000’s)

(in %)

Medicare ....................................................... 
Third party payers ......................................... 
Patient self-pay ............................................. 
HMO’s ........................................................... 
Total Clinical Labs............................................ 

$

849 
2,664 
2,024 
296 
5,833 

$

14 
46 
35 
5 
100%   

1,113  
2,003  
1,635  
303  
5,054  

22 
40 
32 
6 
100%

Total Life Sciences........................................... 
Total accounts receivable ................................ 

7,173 
13,006 

$

7,426  
12,480  

$

Changes in the Company’s allowance for doubtful accounts are as follows:  

In 000’s
Beginning balance .............................................................................. 
Provision for doubtful accounts .......................................................... 
Write-offs, net ..................................................................................... 
Ending balance  .................................................................................. 

$

$

July 31, 2010

4,786 
3,480 
(5,427) 
2,839 

July 31, 2009
$ 

886 
5,189 
(1,289)
4,786 

$ 

For the Clinical Labs segment, the allowance for doubtful accounts represents amounts that the Company does 

not expect to collect after the Company has exhausted its collection procedures. The Company estimates its allowance for 
doubtful accounts in the period the related services are billed and adjusts the estimate in future accounting periods as 
necessary. It bases the estimate for the allowance on the evaluation of historical collection experience, the aging profile of 
accounts receivable, the historical doubtful account write-off percentages, payer mix, and other relevant factors.  

The allowance for doubtful accounts includes the balances, after receipt of the approved settlements from third 

party payers for the insufficient diagnosis information received from the ordering physician, which result in denials of 
payment and the uncollectible portion of receivables from self payers, including deductibles and copayments, which are 
subject to credit risk and patients’ ability to pay. During the years ended July 31, 2010 and 2009, the Company 
determined an allowance for doubtful accounts less than 210 days and wrote off 100% of accounts receivable over 210 
days, as it assumed those accounts are uncollectible, except for certain fully reserved balances, principally related to 
Medicare. These accounts have not been written off because the payer’s filing date deadline has not occurred or the 
collection process has not been exhausted. The Company’s collection experience on Medicare receivables beyond 210 
days has been insignificant. The Company adjusts the historical collection analysis for recoveries, if any, on an ongoing 
basis.  

The Company’s ability to collect outstanding receivables from third party payers is critical to its operating 
performance and cash flows. The primary collection risk lies with uninsured patients or patients for whom primary 
insurance has paid but a patient portion remains outstanding. The Company also assesses the current state of its billing 
functions in order to identify any known collection or reimbursement issues in order to assess the impact, if any, on the 
allowance estimates, which involves judgment. The Company believes that the collectibility of its receivables is directly 
linked to the quality of its billing processes, most notably, those related to obtaining the accurate information in order to bill
effectively for the services provided. Should circumstances change (e.g. shift in payer mix, decline in economic conditions 
or deterioration in aging of receivables), our estimates of net realizable value of receivables could be reduced by a 
material amount.  

Billing for laboratory services is complicated because of many factors, especially: the differences between our 
standard gross fee schedule for all payers and the reimbursement rates of the various payers we deal with, disparity of 
coverage and information requirements among the various payers, and disputes with payers as to which party is 
responsible for reimbursement.  

52

  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The following table indicates the Clinical Labs aged gross receivables by payer group (in thousands), which is 

prior to adjustment to gross receivables for: 1) contractual adjustment, 2) fully reserved balances not yet written off, and 3)
other revenue adjustments.  

As of July 31, 2010
1-30 days  ............................. 
31-60 days  ........................... 
61-90 days  ........................... 
91-120 days  ......................... 
121-150 days  ....................... 
Greater than 150 days*  ........ 
Totals  ................................... 

As of July 31, 2009
1-30 days  ............................. 
31-60 days  ........................... 
61-90 days  ........................... 
91-120 days  ......................... 
121-150 days  ....................... 
Greater than 150 days** ....... 
Totals  ................................... 

Total
Amount
$  21,678 
4,256 
2,565 
1,771 
936 
1,733 
$  32,939 

Total
Amount
$  19,251 
4,508 
1,783 
1,019 
340 
636 
$  27,537 

Medicare
Amount
2,886 
439 
281 
248 
236 
967 
5,057 

%
66 %  $ 
13%   
8%   
5%   
3%   
5%   
100 %  $ 

Medicare
Amount
3,193 
894 
256 
249 
134 
536 
5,262 

%
70 %  $ 
17%   
6%   
4%   
1%   
2%   
100 %  $ 

Third
Party
Payers
%
Amount
57 % $  10,846 
2,458 
1,337 
850 
696 
711 
100 % $  16,898 

9%  
6%  
5%  
4%  
19%  

Third
Party
Payers
Amount
9,695 
1,957 
680 
483 
202 
100 
100 % $  13,117 

%
61 % $ 
16%  
5%  
5%  
3%  
10%  

Self-pay
%
Amount
64% $ 4,242 
1,344 
15%  
935 
8%  
671 
5%  
2 
4%  
52 
4%  
100% $ 7,246 

%
59 %  $
18%   
13%   
9%   
  —%   
1%   
100 %  $

HMO’s
Amount
3,704 
15 
12 
2 
2 
3 
3,738 

%
99%
1%
  —%
  —%
  —%
  —%
100%

Self-pay
Amount
%
73% $ 2,882 
1,635 
15%  
836 
5%  
280 
4%  
— 
2%  
— 
1%  
100% $ 5,633 

%
51 %  $
29%   
15%   
5%   
  —%   
  —%   
100 %  $

HMO’s
Amount
3,481 
22 
11 
7 
4 
— 
3,525 

%
99%
1%
  —%
  —%
  —%
  —%
100%

* Total includes $805 fully reserved over 210 days as of July 31, 2010.  

** Total includes $340 fully reserved over 210 days as of July 31, 2009.  

At July 31, 2009 the Company fully reserved and excluded from the above table all receivables on its legacy billing system 
which was replaced in August 2008. During fiscal 2010 all such reserved balances were written off.  

Income Taxes

The Company accounts for income taxes under the liability method of accounting for income taxes. Under the 

liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to 
differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax 
bases. The liability method requires that any tax benefits recognized for net operating loss carry forwards and other items 
be reduced by a valuation allowance where it is not more likely than not the benefits will be realized in the foreseeable 
future.

Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in 
the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the 
effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the 
enactment date. The Company adopted the accounting standard related to unrecognized tax benefits on August 1, 2007. 
The cumulative effect of adopting the standard did not have a material impact on the Company’s financial position or 
results of operations.  

53

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Inventory

The Company values inventory at the lower of cost (first-in, first-out) or market. Work-in-process and finished 

goods inventories consist of material, labor, and manufacturing overhead. On a quarterly basis, we review inventory 
quantities on hand and analyze the provision for excess and obsolete inventory based on our estimate of sales forecasts 
based on sales history and anticipated future demand. Our estimate of future product demand may not be accurate and 
we may understate or overstate the provision for excess and obsolete inventory. Accordingly, unanticipated changes in 
demand could have a significant impact on the value of our inventory and results of operations. At July 31, 2010 and 
2009, our reserve for excess and obsolete inventory was $3,821,000 and $2,477,000 respectively.  

Goodwill and Indefinite-Lived Intangibles

Goodwill, representing the cost of acquired businesses in excess of the fair value of net assets acquired, and 

indefinite-lived intangibles are not amortized, but are evaluated annually for impairment. The Company performs its 
annual impairment test as of the first day of its fiscal fourth quarter or if indicators of potential impairment exist. Goodwill is 
considered impaired if the carrying amount of the reporting unit exceeds its estimated fair value. In assessing the 
recoverability of goodwill, the Company reviews both quantitative as well as qualitative factors to support its assumptions 
with regard to fair value. The fair value of a reporting unit, which is based on geographic region, is estimated using both a 
discounted cash flow model and weighted average multiple of revenues and earnings before interest, taxes, depreciation 
and amortization. In determining fair value, the Company makes certain judgments, including the identification of reporting 
units and the selection of comparable companies. Trademarks are considered impaired if the carrying amount exceeds 
their estimated fair value. The fair value of the trademarks is estimated based on a discounted cash flow model. If these 
estimates or their related assumptions change in the future as a result of changes in strategy and/or market conditions, 
the Company may be required to record an impairment charge. To date, there has been no impairment charges recorded.  

Intangible Assets

Intangible assets (exclusive of patents), arose primarily from acquisitions and primarily consist of customer 
relationships, trademarks, licenses, employment and non-compete agreements, and website and database content. 
Finite-lived intangible assets are amortized according to their estimated useful lives, which range from 4 to 15 years. The 
Company has capitalized certain legal costs directly incurred in pursuing patent applications as patent costs. When such 
applications result in an issued patent, the related costs are amortized over a ten year period or the life of the patent, 
whichever is shorter, using the straight-line method. The Company reviews its issued patents and pending patent 
applications, and if it determines to abandon a patent application or that an issued patent no longer has economic value, 
the unamortized balance in deferred patent costs relating to that patent is immediately expensed.  

Accrual for Self-funded Medical

Accruals for self-funded medical insurance are determined based on a number of assumptions and factors, 
including historical payment trends, claims history and current estimates. These estimated liabilities are not discounted. If 
actual trends differ from these estimates, the financial results could be impacted. As of July 31, 2010, the Company has 
established a reserve of $0.6 million, which is included in accrued liabilities, for claims that have been reported but not 
paid and incurred but not reported.  

54

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risk from changes in foreign currency exchange rates resulting from acquisitions with 

foreign locations (See Item 1A. Risk Factors and Note 2 in the Notes to Consolidated Financial Statements) and, to a 
much lesser extent, interest rates on investments in short-term instruments, that could impact our results of operations 
and financial position. We do not currently engage in any hedging or market risk management tools.  

Foreign Currency Exchange Rate Risk 

The financial reporting of our non-U.S. subsidiaries is denominated in currencies other than the U.S. dollar. Since 

the functional currency of our non-U.S. subsidiaries is the local currency, foreign currency translation adjustments are 
accumulated as a component of accumulated other comprehensive income in stockholders’ equity. Assuming a 
hypothetical aggregate change of 10% in the exchange rates of foreign currencies against the U.S. dollar at July 31, 2010, 
our assets and liabilities would increase or decrease by $1.8 million and $0.9 million, respectively, and our net sales and 
net earnings (loss) would increase or decrease by $1.4 million and $0.2 million, respectively, on an annual basis.  

We also maintain intercompany balances and loans receivable with subsidiaries with different local currencies. 
These amounts are at risk of foreign exchange losses if exchange rates fluctuate. Assuming a hypothetical aggregate 
change of 10% in the exchange rates of foreign currencies against the U.S. dollar at July 31, 2010, our pre-tax earnings 
(loss) would be favorably or unfavorably impacted by approximately $0.3 million on an annual basis.  

Interest Rate Risk 

Our excess cash is invested in highly liquid short term U.S. Treasury Bills and money market funds with high 
credit ratings. Changes in interest rates may affect the investment income we earn on cash and cash equivalents and 
therefore affect our cash flows and results of operations. As of July 31, 2010, we were exposed to interest rate change 
market risk with respect to our short-term investments in US Government instruments of $24.8 million. The short-term 
investments bear interest rates ranging from 0% to 0.5%. Each 100 basis point (or 1%) fluctuation in interest rates will 
increase or decrease interest income on the short-term investments by approximately $0.2 million on an annual basis.  

As of July 31, 2010, we did not maintain any fixed or variable interest rate financing.  

Item 8. Financial Statements and Supplementary Data

The response to this item is submitted in a separate section of this report. See Item 15(a) (1) and (2)  

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.  

55

Item 9A. Controls and Procedures 

Evaluation of Disclosure Controls and Procedures

As required by Rule 13a-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), we 

conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of 
July 31, 2010. This evaluation was carried out under the supervision and with participation of our Chief Executive Officer 
and Chief Financial Officer. There are inherent limitations to the effectiveness of any system of disclosure controls and 
procedures. Therefore, effective disclosure controls and procedures can only provide reasonable assurance of achieving 
their control objectives.

Based upon our evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure 

controls and procedures are effective at that reasonable assurance level as of July 31, 2010, and that information required 
to be disclosed in the reports that we file under the Exchange Act is recorded, processed, summarized and reported in a 
timely manner and is accumulated and communicated to management, including our Chief Executive Officer and Chief 
Financial Officer, as appropriate to allow timely decisions regarding required disclosure.  

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting during the fourth quarter ended July 31, 2010 

that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.  

Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial 

reporting, as such term is defined in Rules 13a-15(f) under the Exchange Act.  

Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the 

reliability of financial reporting and the preparation of financial statements for external purposes in accordance with 
generally accepted accounting principles and includes those policies and procedures that:  

• pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and 

dispositions of our assets;  

• provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 

statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being 
made only in accordance with authorizations of management and our directors; and  

• provide reasonable assurance regarding prevention and timely detection of unauthorized acquisition, use or 

disposition of our assets that could have a material effect on our financial statements.  

Internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems 

that are determined to be effective provide only reasonable assurance with respect to financial statement preparation and 
presentation. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may 
become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures 
may deteriorate.  

Management assessed the effectiveness of our internal control over financial reporting based on criteria for 
effective internal control over financial reporting described in Internal Control—Integrated Framework issued by the 
Committee of Sponsoring Organizations of the Treadway Commission (COSO).  

Based on its assessment, management concluded that we maintained effective internal control over financial 

reporting as of July 31, 2010. Ernst & Young LLP, our independent registered public accounting firm, has issued an 
attestation report on our internal control over financial reporting as of July 31, 2010. This report, in which Ernst & Young 
LLP has expressed an unqualified opinion, appears in this Item 9A.  

56

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of Enzo Biochem, Inc.

We have audited Enzo Biochem, Inc.’s internal control over financial reporting as of July 31, 2010, based on criteria 
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the 
Treadway Commission (the COSO criteria). Enzo Biochem, Inc.’s management is responsible for maintaining effective 
internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial 
reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our 
responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.  

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United 
States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether 
effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an 
understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and 
evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such 
other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable 
basis for our opinion.  

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with 
generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and 
procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the 
transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are 
recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting 
principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of 
management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely 
detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the 
financial statements.  

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become 
inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may 
deteriorate.  

In our opinion, Enzo Biochem, Inc. maintained, in all material respects, effective internal control over financial reporting as
of July 31, 2010 based on the COSO criteria.  

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United 
States), the consolidated balance sheets of Enzo Biochem, Inc. as of July 31, 2010 and 2009 and the related consolidated 
statements of operations, stockholders’ equity and comprehensive income (loss) and cash flows for each of the three 
years in the period ended July 31, 2010 of Enzo Biochem, Inc. and our report dated October 14, 2010 expressed an 
unqualified opinion thereon.  

/s/ Ernst & Young LLP 

Jericho, New York 
October 14, 2010

57

Item 9B. Other Information

None  

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required under this item will be set forth in the Company’s proxy statement to be filed with the 

Securities and Exchange Commission on or before November 30, 2010 and is incorporated herein by reference.  

Item 11. Executive Compensation

The information required under this item will be set forth in the Company’s proxy statement to be filed with the 

Securities and Exchange Commission on or before November 30, 2010 and is incorporated herein by reference.  

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required under this item will be set forth in the Company’s proxy statement to be filed with the 

Securities and Exchange Commission on or before November 30, 2010 and is incorporated herein by reference.  

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required under this item will be set forth in the Company’s proxy statement to be filed with the 

Securities and Exchange Commission on or before November 30, 2010 and is incorporated herein by reference.  

Item 14. Principal Accountant Fees and Services

The information required under this item will be set forth in the Company’s proxy statement expected to be filed 

with the Securities and Exchange Commission on or before November 30, 2010 and is incorporated herein by reference.  

PART IV

Item 15. Exhibits, Financial Statement Schedules

(a)  (1)  Consolidated Financial Statements  

Consolidated Balance Sheets - July 31, 2010 and 2009 
Consolidated Statements of Operations- Years ended July 31, 2010, 2009 and 2008 
Consolidated Statements of Stockholders’ Equity and Comprehensive Income (Loss) - Years ended 
July 31, 2010, 2009 and 2008 
Consolidated Statements of Cash Flows - Years ended July 31, 2010, 2009 and 2008  
Notes to Consolidated Financial Statements. 

(2)  Financial Statement Schedule 

Schedule II - Valuation and Qualifying Accounts 

All other schedules have been omitted because the required information is included in the consolidated financial 

statements or the notes thereto or because they are not required.  

58

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3)  Exhibits 

The following documents are filed as Exhibits to this Annual Report on Form 10-K: 

Exhibit No.

Description

3(a) 

3(b) 

3(c) 

3(d) 

3(e) 

10(a) 

10 (b) 

10 (c) 

10 (d) 

10 (e) 

10 (f) 

10 (g) 

10 (h) 

  Certificate of Incorporation (1) 

  Certificate of Incorporation, as amended on March 17, 1980. (1) 

  Certificate of Amendment of the Certificate of Incorporation as amended on June 16, 1981. (2) 

  Certificate of Amendment to the Certificate of Incorporation as of July 22, 1988. (3) 

Amended and restated Bylaws. (4) 

1994 Stock Option Plan. (5) 

1999 Stock Option Plan. (6) 

2005 Equity Compensation Incentive Plan (7) 

Lease agreement with Pari Management (8) 

Settlement and Release Agreement between the Company and Sigma Aldrich (9) 

Stock Purchase Agreement By and Among Enzo Life Sciences, Inc., Axxora Life Sciences Inc., and the 
Stock holders, Option holders and Warrant holders (10) 

Stock Asset Purchase Agreement By and Among Buyer Parties and Seller Parties with respect to the 
Biomol International and affiliate acquisition (11) 

Asset Purchase Agreement By and Among Enzo Life Sciences, Acquisition, Inc. and Assay Designs, 
Inc.(12)  

10 (i)* 

Amended and Restated Employment Agreement with Elazar Rabbani 

10(j)* 

Amended and Restated Employment Agreement with Barry Weiner 

14 (a) 

  Code of Ethics (10) 

21* 

23* 

List of subsidiaries of the Company 

  Consent of Independent Registered Public Accounting Firm 

31 (a)* 

  Certification of CEO Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

31 (b)* 

  Certification of CFO Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

32 (a)* 

  Certification of CEO Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

32 (b)* 

  Certification of CFO Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

59

 
 
  
 
 
 
  
 
  
 
  
 
  
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
  
 
 
  
 
  
 
  
 
  
 
  
 
* 

(1) 

(2) 

(3) 

(4) 

(5) 

(6) 

(7) 

(8) 

(9) 

(10) 

(11) 

(12) 

Notes to exhibits

Filed herewith 

The exhibits were filed as exhibits to the Company’s Registration Statement on Form S-18 (File No. 2-67359) 
and are incorporated herein by reference. 

This exhibit was filed as an exhibit to the Company’s Form 10-K for the year ended July 31, 1981 and is 
incorporated herein by reference. 

This exhibit was filed with the Company’s Annual Report on Form 10-K for the year ended July 31, 1989 and is 
incorporated herein by reference. 

This exhibit was filed with the Company’s Current Report on Form 8-K May 8, 2008 and is incorporated herein 
by reference. 

This exhibit was filed with the Company’s Annual Report on Form 10-K for the year ended July 31, 1995 and is 
incorporated herein by reference. 

This exhibit was filed with the Company’s Registration Statement on Form S-8 (333-87153) and is incorporated 
herein by reference. 

This exhibit was filed as an exhibit to the Company’s Proxy Statement of Schedule 14A filed on January 19, 
2005 and is incorporated herein by reference. 

This exhibit was filed with the Company’s Annual Report on Form 10-K for the year ended July 31, 2006 and is 
incorporated herein by reference. 

This exhibit was filed with the Company’s Current Report on Form 8-K on September 21, 2006 and is 
incorporated herein by reference. 

This exhibit was filed with the Company’s Current Report on Form 8-K May 30, 2007 and is incorporated herein 
by reference. 

This exhibit was filed with the Company’s Current Report on Form 8-K May 8, 2008 and is incorporated herein 
by reference. 

This exhibit was filed with the Company’s Current Report on Form 8-K March 13, 2009 and is incorporated 
herein by reference. 

60

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has 

duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. 

Date: October 14, 2010 

ENZO BIOCHEM, INC. 

By:  /s/ Elazar Rabbani Ph.D. 

Chairman of the Board 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the 

following persons on behalf of the registrant and in the capacities and on the dates indicated. 

By: /s/ Elazar Rabbani Ph.D. 
Elazar Rabbani, 
Chairman of Board of Directors and Secretary 
(Principal Executive Officer) 

By: /s/ Barry W. Weiner 
Barry W. Weiner, 
President, Chief Financial Officer, Principal Accounting Officer, Treasurer and Director 

By: /s/ Irwin Gerson 
Irwin Gerson, Director 

By: /s/ Stephen B. H. Kent Ph.D. 
Stephen B. H. Kent, Director 

By: /s/ Bernard L. Kasten MD 
Bernard Kasten, Director 

By: /s/ Melvin F. Lazar 
Melvin F. Lazar, Director 

By: /s/ Gregory M. Bortz 
Gregory M. Bortz, Director 

October 14, 2010 

October 14, 2010 

October 14, 2010 

October 14, 2010 

October 14, 2010 

October 14, 2010 

October 14, 2010 

61

  
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[THIS PAGE INTENTIONALLY LEFT BLANK] 

FORM 10-K, ITEM 15(a) (1) and (2) 
ENZO BIOCHEM, INC.  

LIST OF CONSOLIDATED FINANCIAL STATEMENTS AND 
FINANCIAL STATEMENT SCHEDULE 

The following consolidated financial statements and financial statement schedule of Enzo Biochem, Inc. are 
included in Item 15(a):

Report of Independent Registered Public Accounting Firm 

Consolidated Balance Sheets — July 31, 2010 and 2009 

Consolidated Statements of Operations — Years ended July 31, 2010, 2009 and 2008 

Consolidated Statements of Stockholders’ Equity and Comprehensive Income (Loss) — Years ended July 31, 

2010, 2009 and 2008

Consolidated Statements of Cash Flows — Years ended July 31, 2010, 2009 and 2008 

Notes to Consolidated Financial Statements

Schedule II - Valuation and Qualifying Accounts — Years ended July 31, 2010, 2009 and 2008 

F-2 

F-3 

F-4 

F-5

F-6 

F-7

S-1 

All other schedules for which provision is made in the applicable accounting regulation of the Securities and 
Exchange Commission are not required under the related instructions or are inapplicable, and therefore have 
been omitted.  

F-1

Report of Independent Registered Public Accounting Firm  

The Board of Directors and Stockholders of Enzo Biochem, Inc.  

We have audited the accompanying consolidated balance sheets of Enzo Biochem, Inc. as of July 31, 2010 and 2009, 
and the related consolidated statements of operations, stockholders’ equity and comprehensive income (loss), and cash 
flows for each of the three years in the period ended July 31, 2010. Our audits also included the financial statement 
schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the 
Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based 
on our audits.  

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United 
States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the 
financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting 
the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used 
and significant estimates made by management, as well as evaluating the overall financial statement presentation. We 
believe that our audits provide a reasonable basis for our opinion.  

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial
position of Enzo Biochem, Inc. at July 31, 2010 and 2009, and the consolidated results of their operations and their cash 
flows for each of the three years in the period ended July 31, 2010, in conformity with U.S. generally accepted accounting 
principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial 
statements taken as a whole, present fairly in all material respects the information set forth therein.  

As discussed in Note 1 to the consolidated financial statements, effective August 1, 2009, the Company adopted revised 
authoritative guidance related to accounting for business combinations.  

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United 
States), Enzo Biochem Inc.’s internal control over financial reporting as of July 31, 2010, based on criteria established in 
Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway 
Commission and our report dated October 14, 2010 expressed an unqualified opinion thereon.  

/s/ Ernst & Young LLP 

Jericho, New York 
October 14, 2010 

F-2

 
 
ENZO BIOCHEM, INC. 
CONSOLIDATED BALANCE SHEETS 
(in thousands, except share and per share data) 

July 31,
2010

July 31,
2009

ASSETS
Current assets: 

Cash and cash equivalents................................................................................................... 
Short term investments ......................................................................................................... 
Accounts receivable, net of allowance for doubtful accounts of $2,839 in 2010 and 

$4,786 in 2009 ................................................................................................................... 
Inventories............................................................................................................................. 
Prepaid expenses ................................................................................................................. 

$

8,759 
24,807 

$

6,929 
43,306 

13,006 
8,882 
2,284 

12,480 
9,264 
2,482 

Total current assets.................................................................................................................. 

57,738 

74,461 

Property, plant, and equipment, net......................................................................................... 
Goodwill.................................................................................................................................... 
Intangible assets, net ............................................................................................................... 
Other ........................................................................................................................................ 

11,858 
24,943 
20,368 
338 

11,323 
24,896 
22,009 
439 

Total assets .............................................................................................................................. 

$ 115,245 

$ 133,128 

LIABILITIES AND STOCKHOLDERS’ EQUITY 

Current liabilities: 

Accounts payable – trade ..................................................................................................... 
Accrued liabilities .................................................................................................................. 
Other current liabilities .......................................................................................................... 
Deferred taxes....................................................................................................................... 

$

$

6,455 
8,509 
572 
21 

4,242 
8,426 
1,062 
213 

Total current liabilities .............................................................................................................. 

15,557 

13,943 

Deferred taxes.......................................................................................................................... 
Other ........................................................................................................................................ 

2,582 
90 

2,366 
38 

Commitments and contingencies 

Stockholders’ equity: 

Preferred Stock, $.01 par value; authorized 25,000,000 shares; no shares issued or 

outstanding ........................................................................................................................ 

— 

— 

Common Stock, $.01 par value; authorized 75,000,000 shares; shares issued: 

38,782,725 at July 31, 2010 and 38,589,880 at July 31, 2009.......................................... 
Additional paid-in capital ....................................................................................................... 
Less treasury stock at cost: 623,848 shares at July 31, 2010 and 735,554 shares at July 
31, 2009 ............................................................................................................................. 
Accumulated deficit ............................................................................................................... 
Accumulated other comprehensive income.......................................................................... 

388 
  306,561 

386 
306,280 

(8,854) 
  (201,954) 
875 

(10,440)
(179,721)
276 

Total stockholders’ equity......................................................................................................... 

97,016 

116,781 

Total liabilities and stockholders’ equity................................................................................... 

$ 115,245 

$ 133,128 

The accompanying notes are an integral part of these consolidated financial statements 

F-3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
CONSOLIDATED STATEMENTS OF OPERATIONS 
(in thousands, except per share data)

Revenues: 

Product revenues ........................................................................................... 
Royalty and license fee income ..................................................................... 
Clinical laboratory services ............................................................................ 

Years ended July 31, 

2010 

2009 

2008 

 $ 43,111  
9,793  
44,178  
97,082  

 $  40,592 
9,376 
39,604 
89,572 

 $ 28,087 
7,630 
42,078 
77,795 

Operating expenses: 

Cost of product revenues............................................................................... 
Cost of clinical laboratory services................................................................. 
Research and development ........................................................................... 
Selling, general, and administrative ............................................................... 
Provision for uncollectible accounts receivable ............................................. 
Legal .............................................................................................................. 
Litigation settlement and related costs........................................................... 

22,547  
29,570  
9,704  
48,395  
3,480  
1,746  
3,698  

26,766 
26,295 
9,220 
41,314 
5,189 
4,195 
— 

19,159 
22,209 
8,637 
33,272 
3,716 
5,588 
— 

Total operating expenses............................................................................... 

  119,140  

112,979 

92,581 

Operating loss ................................................................................................... 

(22,058 ) 

(23,407) 

(14,786)

Other income (expense): 

Interest ........................................................................................................... 
Other .............................................................................................................. 
Foreign exchange (loss) gain......................................................................... 

19  
44  
(266 ) 

581 
74 
(725) 

3,696 
171 
27 

Loss before income taxes ................................................................................. 
Benefit (provision) for income taxes.................................................................. 

(22,261 ) 
28  

(23,477) 
(87) 

(10,892)
239 

Net loss ............................................................................................................. 

($ 22,233 ) 

($  23,564) 

($ 10,653)

Net loss per common share: 

Basic .............................................................................................................. 

($

0.59 ) 

($ 

0.63) 

($

0.29)

Diluted ............................................................................................................ 

($

0.59 ) 

($ 

0.63) 

($

0.29)

Weighted average common shares outstanding: 

Basic .............................................................................................................. 

38,001  

37,511 

36,883 

Diluted ............................................................................................................ 

38,001  

37,511 

36,883 

The accompanying notes are an integral part of these consolidated financial statements 

F-4

 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY 
AND COMPREHENSIVE INCOME (LOSS) 
Years ended July 31, 2010, 2009, and 2008 
(In thousands, except share data) 

Common
Stock
Shares

Treasury
Stock
Shares

Common
Stock
Amount

Additional
Paid-in
Capital

Treasury
Stock
Amount

Accumulated
Deficit

Accumulated
Other
Comprehensive
(Loss) Income

Total
Stockholders’
Equity

Comprehensive
income (loss)

Balance at July 31, 2007  ....................... 

  37,280,723 

596,456 

$ 

372 

$ 295,899 

$

(8,915) 

$

(145,504) 

$

42 

$ 

141,894 

(10,653)
— 
— 
— 
— 

— 
— 

1,544 

(9,109)

(23,564)
— 
— 
— 
— 

— 

— 

(1,310)

(24,874)

(22,233)
— 
— 

— 

599 

$

(21,634)

Net (loss) for the year ended July 31, 

2008  .................................................
Purchase of treasury stock ....................
Exercise of stock options ....................... 
Vesting of restricted stock  ..................... 
Stock based compensation charges ......
Issuance of stock for employee 401(k) 

plan match  ....................................... 
Issuance of stock for acquisition  ........... 
Common stock issuance costs 

adjustment  ....................................... 

Foreign currency translation 

— 
— 
267,345 
70,963 
— 

36,550 
352,000 

adjustments ......................................

— 

Comprehensive (loss)  ........................... 

— 
181,263 

— 
— 

— 
— 

— 

— 

— 

3 
1 
— 

— 
4 

— 

— 

— 

2,881 
— 
1,566 

481 
2,996 

(12) 

— 

— 
(2,416) 
— 
— 
— 

— 
— 

— 

— 

(10,653) 
— 
— 
— 
— 

— 
— 

— 

— 

— 
— 
— 
— 
— 

— 
— 

— 

1,544 

$

(10,653) 
(2,416) 
2,884 
1 
1,566 

481 
3,000 

(12) 

1,544 

Balance at July 31, 2008  ....................... 

  38,007,581 

777,719 

380 

303,811 

(11,331) 

(156,157) 

1,586 

138,289 

Net (loss) for the year ended July 31, 

2009  .................................................
Purchase of treasury stock ....................
Exercise of stock options ....................... 
Vesting of restricted stock  ..................... 
Stock based compensation charges ......
Issuance of treasury stock for 

employee 401(k) plan match  ............

Issuance of stock for acquisition earn 

— 
— 
251,162 
128,941 
— 

— 
99,985 

— 
— 

— 

(142,150) 

out  .................................................... 

202,196 

Foreign currency translation 

adjustments ......................................

— 

— 

— 

Comprehensive (loss)  ........................... 

— 

3 
1 
— 

— 

2 

— 

— 

1,471 
— 
1,435 

— 
(1,126) 
— 
— 
— 

(1,435) 

2,017 

998 

— 

— 

— 

(23,564) 
— 
— 
— 
— 

— 

— 

— 

— 
— 
— 
— 
— 

— 

— 

(23,564) 
(1,126) 
1,474 
1 
1,435 

582 

1,000 

(1,310) 

(1,310) 

Balance at July 31, 2009  ....................... 

  38,589,880 

735,554 

386 

306,280 

(10,440) 

(179,721) 

276 

116,781 

Net (loss) for the year ended July 31, 

2010  .................................................
Vesting of restricted stock  ..................... 
Stock based compensation charges ......
Issuance of treasury stock for 

employee 401(k) plan match  ............

Foreign currency translation 

adjustments ......................................

Comprehensive (loss)  ........................... 

— 
192,845 
— 

— 
— 
— 

— 

— 

(111,706) 

— 

— 
2 
— 

— 

— 

— 
— 
1,170 

— 
— 
— 

(889) 

1,586 

— 

— 

(22,233) 
— 
— 

— 

— 

— 
— 
— 

— 

599 

(22,233) 
2 
1,170 

697 

599 

Balance at July 31, 2010  ....................... 

  38,782,725 

623,848 

$ 

388 

$ 306,561 

$

(8,854) 

$

(201,954) 

$

875 

$ 

97,016 

The accompanying notes are an integral part of these consolidated financial statements 

F-5

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC.  
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(in thousands)  

Cash flows from operating activities: 
Net loss  ......................................................................................................  

($

22,233) 

($

23,564) 

($

10,653)

Years ended July 31, 

2010 

2009 

2008

Adjustments to reconcile net loss to net cash used in operating activities:  
Depreciation and amortization of property, plant and equipment  ...........  
Amortization of intangible assets  ............................................................  
Provision for uncollectible accounts receivable  ......................................  
Write-off and/or reserve for obsolete inventory .......................................  
Deferred income tax benefit ....................................................................  
Share based compensation charges  ......................................................  
Issuance of common stock for 401(k) employer match  ..........................  
Accrual for 401(k) employer match  .........................................................  
Deferred revenue recognized  .................................................................  
Gain on termination of officers life insurance policies .............................  
Foreign exchange loss on intercompany loan  ........................................  

Changes in operating assets and liabilities: 
Accounts receivable  ................................................................................  
Inventories ...............................................................................................  
Prepaid expenses  ...................................................................................  
Accounts payable – trade  .......................................................................  
Accrued liabilities  ....................................................................................  
Other current liabilities ............................................................................  
Other liabilities .........................................................................................  
Total adjustments ....................................................................................  

2,727 
1,542 
3,480 
1,344 
(45) 
1,170 
697 
418 
(450) 
— 
45 

(3,844) 
(663) 
220 
2,348 
(232) 
(78) 
90 
8,769 

2,185 
1,277 
5,189 
378 
— 
1,435 
582 
— 
(475) 
— 
697 

(1,409) 
2,269 
208 
(571) 
528 
(206) 
— 
12,087 

1,488
658
3,716
283
(644)
1,566
481
—
(426)
(313)
—

(2,837)
1,012
(574)
(1,060)
(1,066)
(195)
—
2,089

Net cash used in operating activities  ...................................................  

(13,464) 

(11,477) 

(8,564)

Cash flows from investing activities: 

Capital expenditures  ...............................................................................  
Maturities of short term investments  .......................................................  
Purchases of short term investments ......................................................  
Decrease (increase) in security deposits and other ................................  
Acquisitions, net of cash acquired  ..........................................................  
Proceeds from termination of officers life insurance ...............................  
Net cash provided by (used in) investing activities ..............................  

(3,251) 
232,140 
(213,643) 
81 
— 
— 
15,327 

(2,709) 
318,650 
(361,956) 
384 
(14,541) 
— 
(60,172) 

Cash flows from financing activities: 

Proceeds from the exercise of stock options  ..........................................  
Issuance costs from issuance of common stock  ....................................  
Net cash provided by financing activities .............................................  

— 
— 
— 

Effect of exchange rate changes on cash and cash equivalents ............  

(33) 

348 
— 
348 

(92) 

(3,231)
—
—
(491)
(16,144)
1,085
(18,781)

470
(12)
458

60

Increase (decrease) in cash and cash equivalents .................................  
Cash and cash equivalents - beginning of year ......................................  
Cash and cash equivalents - end of year  ...............................................  

1,830 
6,929 
8,759 

(71,393) 
78,322 
6,929 

$

(26,827)
105,149
78,322

$

$

The accompanying notes are an integral part of these consolidated financial statements 

F-6

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

Note 1 - Summary of significant accounting policies  

Nature of business

Enzo Biochem, Inc. (the “Company”) is an integrated life science and biotechnology company engaged in research, 
development, manufacturing and marketing of diagnostic and research products based on genetic engineering, 
biotechnology and molecular biology. These products are designed for the diagnosis of and/or screening for infectious 
diseases, cancers, genetic defects and other medically pertinent diagnostic information and are distributed in the United 
States and internationally. The Company is conducting research and development activities in the development of 
therapeutic products based on the Company’s technology platform of genetic modulation and immune modulation. The 
Company also operates a clinical laboratory that offers and provides diagnostic medical testing services in the New York, 
New Jersey and Eastern Pennsylvania medical communities. The Company operates in three segments (see Note 17).  

Principles of consolidation 

The accompanying consolidated financial statements have been prepared in conformity with accounting principles 
generally accepted in the United States (“U.S. GAAP”) and include the accounts of the Company and its wholly-owned 
subsidiaries, Enzo Clinical Labs, Inc., Enzo Life Sciences, Inc., Enzo Therapeutics, Inc. and Enzo Realty LLC (“Realty”). 
All intercompany transactions and balances have been eliminated. The results of operations for companies acquired are 
included in the consolidated financial statements from the effective date of the acquisition.  

Use of Estimates 

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and 
assumptions that affect the amounts reported in the financial statements and accompanying footnotes. Actual results 
could differ from those estimates.  

Foreign Currency Translation 

The Company has determined that the functional currency for its foreign subsidiaries is the local currency. Assets and 
liabilities denominated in foreign currencies are translated at current exchange rates and profit and loss accounts are 
translated at weighted average exchange rates. Resulting translation gains and losses are included as a separate 
component of stockholders’ equity as accumulated other comprehensive income or loss.  

Cash and cash equivalents 

Cash and cash equivalents consist of demand deposits with banks and highly liquid money market funds.  

Short term investments

Short term investments are highly liquid U.S. Government instruments with maturities of less than ninety days.  

Fair Values of Financial Instruments

The recorded amounts of the Company’s cash and equivalents, short-term investments, receivables, accounts payable 
and accrued liabilities approximate their fair values principally because of the short-term nature of these items. The fair 
value of short term investments is based on quoted market prices where available.  

Concentration of credit risk

Financial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash and 
cash equivalents, short term investments, and accounts receivable. The Company’s short term investments are invested 
in highly liquid US Government instruments.  

F-7

ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

The Company believes the fair value of the aforementioned financial instruments approximates the current value due to 
the immediate or short-term nature of these items.  

Concentration of credit risk with respect to the Company’s Life Sciences segment is mitigated by the diversity of the 
Company’s clients and their dispersion across many different geographic regions. To reduce risk, the Company routinely 
assesses the financial strength of these customers and, consequently, believes that its accounts receivable credit 
exposure with respect to these customers is limited.  

The Company believes that the concentration of credit risk with respect to the Clinical Labs accounts receivable is 
mitigated by the diversity of its numerous third party payers and individual patient accounts and is limited to certain large 
payers that insure individuals that utilize the Clinical Labs services. To reduce risk, the Company routinely assesses the 
financial strength of these payers and, consequently, believes that its accounts receivable credit risk exposure, with 
respect to these payers, is limited. While the Company also has receivables due from the Federal Medicare program, the 
Company does not believe that these receivables represent a credit risk since the Medicare program is funded by the 
federal government and payment is primarily dependent on our submitting the appropriate documentation.  

Accrual for Self-Funded Medical 

Accruals for self-funded medical insurance are determined based on a number of assumptions and factors, including 
historical payment trends, claims history and current estimates. These estimated liabilities are not discounted. If actual 
trends differ from these estimates, the financial results could be impacted.  

Revenue Recognition

Product revenues 

Revenues from product sales are recognized when the products are shipped and title transfers, the sales price is fixed or 
determinable and collectibility is reasonably assured.  

Royalties

Royalty revenues are recorded in the period earned. Royalties received in advance of being earned are recorded as 
deferred revenues in the accompanying balance sheet.  

License Fees and Multiple Element Arrangements 

When evaluating multiple element arrangements, the Company considers whether the components of the arrangement 
represent separate units of accounting. The evaluation requires subjective determinations and requires management to 
make judgments about the fair value of the individual elements and whether such elements are separable from the other 
aspects of the contractual relationship. License fees received in advance of being earned are recorded as deferred 
revenues in the accompanying balance sheet.  

F-8

ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

Clinical laboratory services 

Revenues from the Clinical Labs segment are recognized upon completion of the testing process for a specific patient and 
reported to the ordering physician. These revenues and the associated accounts receivable are based on gross amounts 
billed or billable for services rendered, net of a contractual adjustment, which is the difference between amounts billed to 
payers and the expected approved reimbursable settlements from such payers.  

The following tables of the Clinical Lab segment’s net revenues and revenue percentages by revenue category:  

Revenue category
Medicare ....................... 
Third-party payers  ........ 
Patient self-pay  ............ 
HMO’s  .......................... 
Total  ............................. 

$

$

2010

Years ended July 31 
2009

2008

(In 000’s)

(in %)

(In 000’s)

(in %)

(In 000’s)

(in %)

11,158 
19,534 
8,758 
4,728 
44,178 

$

25 
44 
20 
11 

100%  $

9,138 
20,073 
6,056 
4,337 
39,604 

$

23 
51 
15 
11 

100%  $

9,078 
24,768 
3,582 
4,650 
42,078 

22 
59 
8 
11 
100%

The Company provides services to certain patients covered by various third-party payers, including the Federal Medicare 
program. Laws and regulations governing Medicare are complex and subject to interpretation for which action for 
noncompliance includes fines, penalties and exclusion from the Medicare programs. The Company believes that it is in 
compliance with all applicable laws and regulations and is not aware of any pending or threatened investigations involving 
allegations of potential wrongdoing.  

Other than the Medicare program, United Healthcare of New York whose programs are included in the “Third-party 
payers” and “Health Maintenance Organizations” (“HMO’s”) categories represents 25%, 25% and 26% of the Clinical Labs 
segment net revenue for the fiscal year ended July 31, 2010, 2009 and 2008 respectively.  

Contractual Adjustment

The Company’s estimate of contractual adjustment is based on significant assumptions and judgments, such as its 
interpretation of payer reimbursement policies, and bears the risk of change. The estimation process is based on the 
experience of amounts approved as reimbursable and ultimately settled by payers, versus the corresponding gross 
amount billed to the respective payers. The contractual adjustment is an estimate that reduces gross revenue, based on 
gross billing rates, to amounts expected to be approved and reimbursed. Gross billings are based on a standard fee 
schedule the Company sets for all third-party payers, including Medicare, HMO’s and managed care providers. The 
Company adjusts the contractual adjustment estimate quarterly, based on its evaluation of current and historical 
settlement experience with payers, industry reimbursement trends, and other relevant factors which include the monthly 
and quarterly review of: 1) current gross billings and receivables and reimbursement by payer, 2) current changes in third 
party arrangements and 3) the growth of in-network provider arrangements and managed care plans specific to our 
Company.  

During the years ended July 31, 2010, 2009 and 2008, the contractual adjustment percentages, determined using current 
and historical reimbursement statistics, were 83.0%, 80.8% and 81.8%, respectively, of gross billings.  

F-9

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

Accounts Receivable and Allowance for Doubtful Accounts 

Accounts receivable are reported at realizable value, net of allowances for doubtful accounts, which is estimated and 
recorded in the period of the related revenue.  

For the Clinical Labs segment, the allowance for doubtful accounts represents amounts that the Company does not 
expect to collect after the Company has exhausted its collection procedures. The Company estimates its allowance for 
doubtful accounts in the period the related services are billed and adjusts the estimate in future accounting periods as 
necessary. It bases the estimate for the allowance on the evaluation of historical collection experience, the aging profile of 
accounts receivable, payer mix and other relevant factors.  

During the years ended July 31, 2010 and 2009, the Company determined an allowance for doubtful accounts for 
customers whose accounts receivable have been outstanding less than 210 days and wrote off 100% of accounts 
receivable over 210 days, as it determined based on historical trends that those accounts were uncollectible, except for 
certain fully reserved balances, principally related to Medicare. These accounts have not been written off because the 
payer’s filing date deadline has not occurred or the collection process has not been exhausted. The Company adjusts the 
historical collection analysis for recoveries, if any, on an ongoing basis.  

The Company’s ability to collect outstanding receivables from third-party payers is critical to its operating performance and 
cash flows. The primary collection risk lies with uninsured patients or patients for whom primary insurance has paid but a 
patient portion remains outstanding. The Company also assesses the current state of its billing functions in order to 
identify any known collection issues and to assess the impact, if any, on the allowance estimates which involves 
judgment. The Company believes that the collectibility of its receivables is directly linked to the quality of its billing 
processes, most notably, those related to obtaining the correct information in order to bill effectively for the services 
provided. Should circumstances change (e.g. shift in payer mix, decline in economic conditions or deterioration in aging of 
receivables), our estimates of net realizable value of receivables could be reduced by a material amount.  

The Clinical Labs segment’s net receivables are detailed by billing category and as a percent to its total net receivables. 
At July 31, 2010 and 2009, approximately 45% and 40%, respectively, of the Company’s net accounts receivable relates 
to its Clinical Labs business, which operates in the New York, New Jersey, and Eastern Pennsylvania medical 
communities.  

The Life Sciences segment’s accounts receivable includes royalties receivable of $2.5 million, as of July 31, 2010 and 
2009, of which approximately $1.8 million and $1.9 million, respectively is from Qiagen Corporation (see Note 13).  

The following is a table of the Company’s net accounts receivable by segment.  

Net accounts receivable by segment
Clinical Labs (by billing category) 

Medicare  ............................................................  
Third party payers  ..............................................  
Patient self-pay  ..................................................  
HMO’s  ................................................................  
Total Clinical Labs .................................................  

Total Life Sciences ................................................  
Total accounts receivable  .....................................  

As of 
July 31, 2010

As of 
July 31, 2009

(In 000’s)

(in %)

(In 000’s)

(in %)

$

$

849 
2,664 
2,024 
296 
5,833 

7,173 
13,006 

$

14 
46 
35 
5 
100%   

1,113 
2,003 
1,635 
303 
5,054 

7,426 
12,480 

$

22 
40 
32 
6 
100%

F-10

 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

Changes in the Company’s allowance for doubtful accounts are as follows:  

In 000’s 
Beginning balance ......................................................................................... 
Provision for doubtful accounts  ..................................................................... 
Write-offs  ....................................................................................................... 
Ending balance  ............................................................................................. 

July 31, 2010 
4,786 
$
3,480 
(5,427) 
2,839 

$

Inventories 

$

  July 31, 2009  
886 
5,189 
(1,289)
4,786 

$

Inventories are stated at the lower of cost (first-in, first-out) or market. The Company evaluates its inventories to determine
excess or slow moving products based on quantities on hand and expected future demand. For those items which the 
Company believes it has an excess supply or for items that are obsolete, the Company estimates the net amount that it 
expects to realize from the sale of such products.  

Property, plant and equipment 

Property, plant and equipment is stated at cost, and depreciated on the straight-line basis over the estimated useful lives 
of the various asset classes as follows: building and building improvements 15-30 years and laboratory machinery and 
equipment and office furniture and computer equipment - ranges from 3-10 years. Leasehold improvements are amortized 
over the term of the related leases or estimated useful lives of the assets, whichever is shorter.  

Impairment of Long-Lived Assets 

The Company reviews the recoverability of the carrying value of long-lived assets for impairment whenever events or 
changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. Should indicators of 
impairment exist, the carrying values of the assets are evaluated in relation to the operating performance and future 
undiscounted cash flows of the underlying business. The net book value of an asset is adjusted to fair value if its expected 
future undiscounted cash flow is less than its book value. No indicators of impairment were identified during the years 
ended July 31, 2010, 2009 or 2008.  

Goodwill and Indefinite-Lived Intangibles

Goodwill, representing the cost of acquired businesses in excess of the fair value of net assets acquired, and indefinite-
lived intangibles are not amortized, but are evaluated annually for impairment. The Company performs its annual 
impairment test as of the first day of its fiscal fourth quarter or if indicators of potential impairment exist. Goodwill is 
considered impaired if the carrying amount of the reporting unit exceeds its estimated fair value. In assessing the 
recoverability of goodwill, the Company reviews both quantitative as well as qualitative factors to support its assumptions 
with regard to fair value. The fair value of a reporting unit, which is based on geographic region, is estimated using both a 
discounted cash flow model and weighted average multiple of revenues and earnings before interest, taxes, depreciation 
and amortization. In determining fair value, the Company makes certain judgments, including the identification of reporting 
units and the selection of comparable companies. Trademarks are considered impaired if the carrying amount exceeds 
their estimated fair value. The fair value of the trademarks is estimated based on a discounted cash flow model. If these 
estimates or their related assumptions change in the future as a result of changes in strategy and/or market conditions, 
the Company may be required to record an impairment charge. To date, there has been no impairment charges recorded.  

Intangible Assets 

Intangible assets (exclusive of patents), arose primarily from acquisitions (See Note 2), and primarily consist of customer 
relationships, trademarks, licenses, employment and non-compete agreements, and website and database content. 
Finite-lived intangible assets are amortized according to their estimated useful lives, which range from 4 to 15 years.  

F-11

  
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

The Company has capitalized certain legal costs directly incurred in pursuing patent applications as patent costs. When 
such applications result in an issued patent, the related costs are amortized over a ten year period or the life of the patent,
whichever is shorter, using the straight-line method. The Company reviews its issued patents and pending patent 
applications, and if it determines to abandon a patent application or that an issued patent no longer has economic value, 
the unamortized balance in deferred patent costs relating to that patent is immediately expensed.  

Comprehensive income (loss)

Comprehensive loss consists of net loss and foreign currency translation adjustments. Foreign currency translation 
adjustments included in comprehensive loss were not tax effected as investments in international affiliates are deemed to 
be permanent. Accumulated other comprehensive income is a separate component of stockholders’ equity and consists of 
net loss and foreign currency translation adjustments.  

Shipping and Handling Costs 

Shipping and handling costs associated with the distribution of finished goods to customers are recorded in cost of goods 
sold.  

Research and Development 

Research and development costs are charged to expense as incurred.  

Advertising

All costs associated with advertising are expensed as incurred. Advertising expense, included in Selling, general and 
administrative expense, approximated $375,000, $634,000 and $113,000 for the years ended July 31, 2010, 2009 and 
2008, respectively.  

Income Taxes 

The Company accounts for income taxes under the liability method of accounting for income taxes. Under the liability 
method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences 
between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. The 
liability method requires that any tax benefits recognized for net operating loss carryforwards and other items be reduced 
by a valuation allowance when it is more likely than not that the benefits may not be realized. Deferred tax assets and 
liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary 
differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and 
liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.  

It is the Company’s policy to provide for uncertain tax positions and the related interest and penalties based upon 
management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax 
authorities. At July 31, 2010, the Company believes it has appropriately accounted for any unrecognized tax benefits. To 
the extent the Company prevails in matters for which a liability for an unrecognized tax benefit is established or is required 
to pay amounts in excess of the liability, the Company’s effective tax rate in a given financial statement period may be 
affected.

Segment Reporting

The Company follows accounting pronouncements which establish standards for reporting information on operating 
segments in interim and annual financial statements. An enterprise is required to separately report information about each 
operating segment that engages in business activities from which the segment may earn revenues and incur expenses, 
whose separate operating results are regularly reviewed by the chief operating decision maker regarding allocation of 
resources and performance assessment and which exceed specific quantitative thresholds related to revenue and profit or 
loss. The Company’s operating activities are reported in three segments (see Note 17).  

F-12

ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

Net income (loss) per share

Basic net income (loss) per share represents net income (loss) divided by the weighted average number of common 
shares outstanding during the period. The dilutive effect of potential common shares, consisting of outstanding stock 
options and unvested restricted stock, is determined using the treasury stock method. Diluted weighted average shares 
outstanding for fiscal 2010, 2009 and 2008 do not include the potential common shares from stock options and unvested 
restricted stock because to do so would have been antidilutive. Accordingly, basic and diluted net loss per share is the 
same in fiscal 2010, 2009 and 2008. The number of potential common shares (“in the money options”) and unvested 
restricted stock excluded from the calculation of diluted earnings per share during the years ended July 31, 2010, 2009, 
and 2008 was 51,000, 105,000, and 240,000, respectively.  

For the years ended July 31, 2010, 2009 and 2008, the effect of approximately 1,132,000, 1,191,000 and 1,734,000 
respectively, of outstanding “out of the money” options to purchase common shares were excluded from the calculation of 
diluted net loss per share because their effect would be anti-dilutive. The following table sets forth the computation of 
basic and diluted net loss per share for the years ended July 31:  

In 000’s 
Numerator: 
Net loss ............................................................................................................... 

2010

2009

2008 

$ (22,233) 

$  (23,564) 

$ (10,653)

Denominator: 
Weighted-average common shares outstanding- Basic ..................................... 

38,001 

  37,511 

  36,883 

Add: effect of dilutive stock options and restricted stock .................................... 
Weighted-average common shares outstanding - Diluted.................................. 

— 
38,001 

— 
  37,511 

— 
  36,883 

Net loss per share 

Basic ................................................................................................................ 
Diluted .............................................................................................................. 

$
$

(0.59) 
(0.59) 

$ 
$ 

(0.63) 
(0.63) 

$
$

(0.29)
(0.29)

Share-Based Compensation 

The Company records compensation expense associated with stock options and restricted stock based upon the fair 
value of stock based awards as measured at the grant date. The expense is recorded by amortizing the fair values on a 
straight line basis over the vesting period, adjusted for estimated forfeitures.  

F-13

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

For the years ended July 31, 2010, 2009 and 2008, share-based compensation expense relating to the fair value of 
restricted shares and restricted stock units was approximately $1,170,000, $1,415,000, and $1,316,000, respectively (see 
Note 11). No excess tax benefits were recognized for the year ended July 31, 2010, 2009 and 2008.  

The following table sets forth the amount of expense related to share-based payment arrangements included in specific 
line items in the accompanying statement of operations for the years ended July 31:  

In 000’s   
Cost of clinical laboratory services or product revenues ........................... 
Research and development ....................................................................... 
Selling, general and administrative ............................................................ 

$

2010 
12 
14 
1,144 
$ 1,170 

$

2009 
8
13 
1,414 
$ 1,435

$

2008 
14 
97 
  1,455 
$ 1,566 

As of July 31, 2010, there was $1.7 million of total unrecognized compensation cost related to nonvested share-based 
payment arrangements granted under the Company’s stock option and restricted stock plans, which will be recognized 
over a weighted average remaining life of approximately 1.25 years.  

Subsequent events 

In accordance with authoritative guidance, the Company evaluates subsequent events through the date of filing.  

Effect of new accounting pronouncements 

In October 2009, the FASB issued a Consensus of the FASB Emerging Issues Task Force relating to Multiple Deliverable 
Revenue Arrangements. This standard provides application guidance on whether multiple deliverables exist, how the 
deliverables should be separated and how the consideration should be allocated to one or more units of accounting. This 
update establishes a selling price hierarchy for determining the selling price of a deliverable. The selling price used for 
each deliverable will be based on vendor-specific objective evidence, if available, third-party evidence if vendor-specific 
objective evidence is not available, or estimated selling price if neither vendor-specific or third-party evidence is available.
This guidance is effective for revenue arrangements entered into or materially modified in fiscal years beginning on or 
after June 15, 2010. Early adoption is permitted. The Company will adopt this guidance effective August 1, 2010. The 
Company has assessed the impact of adoption and it is not expected to have a material effect on our consolidated results 
of operations and financial condition.  

In August 2009, the Company adopted the provisions of the accounting standard on fair value measurements that apply to 
nonfinancial assets and liabilities that are recognized or disclosed at fair value on a non-recurring basis. The adoption of 
these provisions did not have an impact on the consolidated financial statements or disclosures.  

In June 2009, the FASB issued authoritative guidance to establish the FASB Accounting Standards Codification as the 
source of authoritative accounting principles and the framework for selecting the principles used in the preparation of 
financial statements of nongovernmental entities that are presented in conformity with generally accepted accounting 
principles in the United States. This guidance only impacted references for accounting guidance.  

On August 1, 2009, the Company adopted the revised authoritative guidance on business combinations which changed 
existing practice, in part, as follows: (1) contingent consideration arrangements are now fair valued at the acquisition date 
and included on that basis in the purchase price consideration; (2) transaction costs are now expensed as incurred, rather 
than capitalized as part of the purchase price; (3) reversal of valuation allowances created in purchase accounting are 
now recorded through the income tax provision; and (4) in order to accrue for a restructuring plan in purchase accounting, 
all authoritative guidance would have to be met at the acquisition date. While the adoption of this standard did not have a 
material impact on the Company’s financial statements, it could materially change the accounting for business 
combinations consummated in the future and for tax matters relating to prior acquisitions settled subsequent to July 31, 
2009.

F-14

 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

NOTE 2 - Acquisitions  

Assay Designs, Inc.  

On March 12, 2009, Enzo Life Sciences, Inc. and Enzo Life Sciences Acquisition, Inc., a newly formed wholly owned 
subsidiary of Enzo Life Sciences, Inc. (“Acquisition Sub”), entered into an asset purchase agreement (“Purchase 
Agreement”) with Assay Designs, Inc. (“Assay Designs”). Assay Designs, a privately owned company with annual sales of 
approximately $11 million, was engaged in researching, developing, manufacturing, distributing, marketing and selling 
specialty immunological and biochemical protein detection kits, assays, reagents, antibodies, recombinant proteins and 
related products and providing related services for use in the biotechnology, pharmaceutical and life sciences research 
industries (“Business”). Under the terms of the Purchase Agreement, Acquisition Sub purchased from Assay Designs 
substantially all of its assets, including trade accounts receivable, inventory, fixed assets, and intellectual property, used in
or related to the Business and assumed certain of Assay Designs’ liabilities, including trade accounts payable, capital 
lease obligations and certain other current liabilities.  

The execution of the Purchase Agreement and the closing of the transaction occurred simultaneously on March 12, 2009. 
The purchase price consisted of $12,228,000 in cash, exclusive of acquisition costs of approximately $540,000, and was 
subject to an upward or downward post-closing purchase price adjustment based on Assay Designs’ working capital as of 
the closing date and $328,000 representing estimated costs to consolidate an acquired facility and involuntary termination 
of certain employees. At the closing, $100,000 was held in escrow to secure the payment of any downward post-closing 
purchase price adjustment and $750,000 was held in escrow for 12 months to secure the payment of any indemnification 
obligations of Assay Designs under the Purchase Agreement. Subsequent to the acquisition date, the Company paid 
$270,000 in additional purchase price in connection with the working capital adjustment and released the $100,000 and 
$750,000 escrow amounts. The acquisition was funded with the Company’s cash. Effective March 12, 2009, Assay 
Designs became a wholly-owned subsidiary of Enzo Life Sciences. The consolidated financial statements include the 
results of operations for Assay Designs from the date of acquisition.  

The following table presents the fair values of the assets acquired and liabilities assumed (in thousands) as of the date of 
acquisition:

Current assets ..............................................................................................................  $
Property and equipment............................................................................................... 
Other assets ................................................................................................................. 
Intangible assets .......................................................................................................... 
Goodwill........................................................................................................................ 
Total assets acquired ................................................................................................ 

4,235
1,747 
11
6,360
1,823 
  14,176 

Less:
Current liabilities........................................................................................................... 
Total liabilities assumed............................................................................................ 

1,115 
1,115 
Net assets acquired .....................................................................................................  $ 13,061

The purchase price allocation is based on a valuation of acquired tangible and intangible assets based on the final 
valuation completed in fiscal 2010. The Company determined the fair value of the identifiable intangible assets based on 
various factors including the cost and discounted cash flow models in determining the purchase price allocation. The 
excess of the total purchase price over the fair value of the net assets acquired, including the estimated fair value of the 
identifiable intangible assets, has been allocated to goodwill. 

F-15

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

Biomol International, L.P.  

On May 8, 2008, Enzo Life Sciences, Inc. acquired substantially all of the U.S. based assets and certain liabilities of 
Biomol International, LP (“Biomol LP”) through a newly formed US subsidiary Biomol International, Inc. and all of the stock 
of Biomol’s wholly-owned United Kingdom subsidiary, Affinity Limited, through Axxora UK, a wholly-owned subsidiary of 
Enzo Life Sciences, collectively referred to as “Biomol” for approximately $18.1 million in cash and stock, subject to 
adjustment, exclusive of acquisition costs of approximately $800,000 and two contingent earn-out payments accounted for 
as additional purchase consideration if and when the contingencies are resolved beyond a reasonable doubt. At closing, 
the purchase price was satisfied as follows: $12.9 million in cash was paid to Biomol LP, issuance of 352,000 shares of 
Enzo common stock, at fair market value, to Biomol LP, $1.5 million in cash was paid to an escrow agent for the one-year 
period following the closing to satisfy any indemnification obligations of the sellers under the Agreement and $550,000 
was paid to an escrow agent, for the 60 day period following the closing to satisfy any specified purchase price 
adjustments. The $550,000 was released by the escrow agent in August 2008. The earn-outs of $2.5 million on each of 
the next two anniversaries of the acquisition date will be based on attaining certain revenue and EBITDA targets, as 
defined. Biomol was a privately owned, closely held global manufacturer and marketer of specialty life sciences research 
products. Effective May 8, 2008, Biomol became a wholly-owned subsidiary of Enzo Life Sciences. The acquisition was 
financed with the Company’s cash and cash equivalents and Enzo common stock. The consolidated financial statements 
include the results of operations for Biomol from the date of acquisition. Effective February 2, 2009, the names of Biomol 
International, Inc. and Affinity Limited were changed to Enzo Life Sciences International, Inc. and Enzo Life Sciences (UK) 
Ltd., respectively.  

In June 2009, the conditions for the first annual earn-out of $2.5 million were met and the Company recorded $2.5 million 
of additional goodwill. The Company issued 202,196 shares of Enzo common stock at fair value and paid $1.5 million in 
cash to satisfy the $2.5 million earn-out liability. In July 2010, the Company notified the sellers of Biomol that the 
conditions for the second earn-out were not achieved. The sellers are currently disputing the calculation (see Note 16).  

The following table presents the fair values of the assets acquired and liabilities assumed (in thousands):  

Current assets ...............................................................................................  $
Property and equipment................................................................................ 
Other assets .................................................................................................. 
Intangible assets ........................................................................................... 
Goodwill......................................................................................................... 
Total assets acquired ................................................................................. 

5,167 
939 
18 
7,660 
9,226 
  23,010 

Less: 
Current liabilities............................................................................................ 
Deferred tax liabilities.................................................................................... 
Total liabilities assumed............................................................................. 

1,100 
609 
1,709 
Net assets acquired ......................................................................................  $ 21,301 

The purchase price allocation is based on a valuation of acquired tangible and intangible assets based on the final 
valuation completed in fiscal 2009. The Company determined the estimated fair value of the identifiable intangible assets 
based on various factors including: cost, discounted cash flow and relief from royalty approaches in determining the 
purchase price allocation. The excess of the total purchase price over the fair value of the net assets acquired, including 
the estimated fair value of the identifiable intangible assets, has been allocated to goodwill.  

F-16

 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

In March 2008, a wholly owned subsidiary of Enzo Life Sciences, Inc. acquired 100% of the outstanding stock of a 
distributor of life science products in Belgium for a total consideration of approximately $229,000 in cash, net of cash 
acquired, including transaction costs. Liabilities assumed aggregated $369,000. Prior to the acquisition, the acquired 
company was a distributor of Enzo Life Science’s products as well as other unrelated manufacturers. The Company 
recorded goodwill of $232,000 and intangibles for customer relationships of $174,000 related to this acquisition. The 
consolidated financial statements presented herein include the results of operations for the acquired company from the 
date of acquisition.  

For financial reporting purposes, useful lives for the acquisitions have been assigned as follows:  

Customer relationships ................................... 
Trademarks ..................................................... 
Other intangibles ............................................. 

8 -15 years
Indefinite 
4-5 years 

The following unaudited pro forma financial information presents the combined results of operations of the Company and 
acquisitions completed in 2009 and 2008 as if the acquisitions had occurred as of August 1, 2007. The pro forma financial 
information reflects appropriate adjustments for amortization of intangible assets and interest expense. The pro forma 
financial information presented is not necessarily indicative of either the actual consolidated operating results had the 
acquisition been completed at the beginning of each period or future operating results of the consolidated entities.  

Year Ended July 31, 

2008
Net revenues .......................................................................................  $ 96,227  $ 97,737 
Net loss ...............................................................................................  $ (24,098)  $ (10,381) 
Net loss per common share: 

2009

Basic and diluted..............................................................................  $

(0.64)  $

(0.28) 

Note 3- Supplemental disclosure for statement of cash flows  

In the years ended July 31, 2010, 2009, and 2008, net income taxes paid by the Company approximated $186,000, 
$220,000, and $233,000 respectively.  

In fiscal 2009, certain officers of the Company exercised 206,576 stock options in a non-cash transaction. The officers 
surrendered 99,985 shares of previously acquired common stock to exercise the stock options. The Company recorded 
approximately $1.1 million, the market value of the surrendered shares, as treasury stock.  

In fiscal 2008, certain officers and directors of the Company exercised 220,158 stock options in non-cash transactions. 
The officers surrendered 181,263 shares of previously owned shares of the Company’s common stock to exercise the 
stock options. The Company recorded approximately $2.4 million, the market value of the surrendered shares, as treasury 
stock. 

F-17

  
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

Note 4 – Short term investments  

At July 31, 2010 and 2009 the Company’s short-term investments, whose fair value approximates cost, are in U.S. 
Treasury bills, which are purchased at discounts with remaining maturities of under ninety days.  

The authoritative guidance for fair value measurements establishes a fair value hierarchy that prioritizes the inputs to 
valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in 
active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level
3 measurements). The three levels of the fair value hierarchy under the guidance are described below:  

Level 1:  Valuations based on quoted market prices in active markets for identical assets or liabilities.  

Level 2:

Valuations based on quoted prices for similar assets or liabilities, quoted prices in markets that are not 
active, or other inputs that are observable or can be corroborated by observable data for substantially 
the full term of the assets or liabilities  

Level 3:  Valuations based on inputs that are supported by little or no market activity and that are significant to 

the fair value of the assets or liabilities 

At July 31, 2010 and 2009, the Company’s short-term investments are classified as Level 1 assets.  

Note 5 – Accumulated Other Comprehensive Income (Loss)  

The following is a summary of accumulated other comprehensive income (loss), relating to the effect of foreign currency 
translation:  

In 000’s
Balance - July 31, 2007.................................................. 
Fiscal 2008 – gain on foreign currency translation ........ 

Accumulated income
(loss) before tax
42 
1,544 

$

Tax (expense)
or benefit
— 
— 

Accumulated income
(loss) net of tax
42 
1,544 

$

Balance – July 31, 2008................................................. 
Fiscal 2009 – loss on foreign currency translation......... 

Balance – July 31, 2009................................................. 
Fiscal 2010 – gain on foreign currency translation ........ 
Balance – July 31, 2010................................................. 

$

1,586 
(1,310) 

276 
599 
875 

— 
— 

— 
— 
— 

$

1,586 
(1,310)

276 
599 
875 

Note 6 - Inventories 

At July 31, 2010 and 2009 inventories, net of reserves of $3,821,000 and $2,477,000, respectively, consist of:  

In 000’s
Raw materials.....................................................................  $
Work in process.................................................................. 
Finished products............................................................... 

  $

2010
921  $

2,136 
5,825 
8,882  $

2009
1,228 
1,072 
6,964 
9,264 

F-18

  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

Note 7 – Property, plant, and equipment  

At July 31, 2010 and 2009 property, plant, and equipment consist of:  

In 000’s
Building and building improvements ..................................................................... 
Machinery and equipment..................................................................................... 
Office furniture and computer equipment.............................................................. 
Leasehold improvements ...................................................................................... 

Accumulated depreciation and amortization ......................................................... 

Land and land improvements................................................................................ 

2010
4,309 
6,814 
13,057 
4,572 
28,752 
(17,606) 
11,146 
712 
11,858 

$

$

2009
4,219 
6,553 
11,330 
4,430 
26,532 
(15,921)
10,611 
712 
11,323 

$

$

Note 8 – Goodwill and intangible assets 

The Company’s change in the net carrying amount of goodwill by business segment is as follows (in thousands):  

August 1, 2008 ................................................................................................. 
Acquisition – see Note 2 .................................................................................. 
Other Adjustments ........................................................................................... 
Foreign currency translation............................................................................. 
July 31, 2009 .................................................................................................... 
Foreign currency translation............................................................................. 
July 31, 2010 .................................................................................................... 

Enzo Life
Sciences
13,869 
4,303 
(148) 
(580) 
17,444 
47 
17,491 

$

$

$

$

Enzo
Clinical
Labs
7,452 
— 
— 
— 
7,452 
— 
7,452 

Total
21,321 
4,303 
(148)
(580)
24,896 
47 
24,943 

$

$

Intangible assets, all of which are included in the Life Sciences segment, consist of the following (in thousands):  

Finite-lived intangible assets: 

Patents ...........................................  $
Customer relationships .................. 
Non-compete and employment 

agreements ................................. 
Website and acquired content ....... 
Licensed technology and other ...... 

Indefinitely-lived intangible assets: 

July 31, 2010 
Accumulated
Amortization

Gross

Net

Gross

July 31, 2009 
Accumulated
Amortization

Net

11,027  $
12,099 

(10,154)  $
(2,248) 

873  $

9,851 

11,027  $
12,125 

(10,030)  $
(1,190) 

997
10,935

478 
1,009 
628 

(396) 
(489) 
(285) 

82 
520 
343 

469 
1,005 
588 

(280) 
(303) 
(83) 

189
702
505

Trademarks .................................... 
Total ..................................................  $

8,699 

33,940  $

— 
(13,572)  $

8,699 

8,681 

20,368  $

33,895  $

— 
(11,886)  $

8,681
22,009

F-19

  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

Estimated amortization expense related to these finite-lived intangible assets for the five succeeding fiscal years ending 
July 31 is as follows (in thousands):  

2011 ........................................ 
2012 ........................................ 
2013 ........................................ 
2014 ........................................ 
2015 ........................................ 

  1,432
  1,357
  1,312
  1,187
  1,187

At July 31, 2010, the weighted average useful lives of amortizable intangible assets were approximately 9 years.  

Amortization expense for the years ended July 31, 2010, 2009, and 2008 was $1,542,000, $1,277,000, and $658,000, 
respectively.  

Note 9 - Income taxes 

The benefit (provision) for income taxes is as follows:  

Fiscal year ended July 31, (in 000’s)
Current benefit (provision): 

2010

2009

2008

Federal ..................................................................................................... 
State and local ......................................................................................... 
Foreign ..................................................................................................... 
Deferred benefit .......................................................................................... 
Benefit (provision) for income taxes............................................................ 

$

$

119 
(75) 
(61) 
45 
28 

$ 

$ 

$

— 
(75) 
(12) 
— 
(87)  $

— 
(320)
(85)
644 
239 

Deferred tax assets and liabilities arise from temporary differences between the tax basis of assets and liabilities and their 
reported amounts in the financial statements. The components of deferred tax assets (liabilities) as of July 31, 2010 and 
2009 are as follows:  

In 000’s
Deferred tax assets: 

July 31, 2010

July 31, 2009

$

Federal tax carryforward losses............................................................... 
Provision for uncollectible accounts receivable ....................................... 
State and local tax carry forward losses .................................................. 
Accrued royalties...................................................................................... 
Stock compensation................................................................................. 
Depreciation ............................................................................................. 
Research and development and other tax credit carryforwards .............. 
Foreign tax carryforward losses............................................................... 
Realized and unrealized losses on marketable securities ....................... 
Inventory .................................................................................................. 
Accrued expenses.................................................................................... 
Other, net ................................................................................................. 
Gross deferred tax assets..................................................................... 

Deferred tax liabilities: 

Deferred patent costs............................................................................... 
Intangibles................................................................................................ 
Prepaid expenses .................................................................................... 
Other, net ................................................................................................. 
Gross deferred tax liabilities.................................................................. 

$

23,100  
1,057  
2,117  
103  
1,017  
183  
618  
284 
138  
1,094  
263 
15  
29,989  

(204 ) 
(2,797 ) 
(654 ) 
(36 ) 
(3,691 ) 

26,298  
(28,901 ) 

16,507 
1,763 
2,080 
279 
794 
152 
618 
—
138 
261 
—
251 
22,843 

(235)
(2,730)
(657)
(84)
(3,706)

19,137 
(21,716)
(2,579)

Net deferred tax assets (liabilities) before valuation allowance .................. 
Less: valuation allowance ........................................................................... 
Net deferred tax assets (liabilities).............................................................. 

F-20

$

(2,603 )  $

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
  
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

At July 31, 2010, the Company had net deferred tax liabilities of approximately $2.6 million which consists primarily of 
identifiable intangible assets and cumulative tax deductions in excess of book expenses recognized by foreign 
subsidiaries (see Note 2).  

Deferred tax liabilities are included in the consolidated balance sheets as follows:  

In 000’s
Deferred taxes: 
Current ............................................................................................................................. 
Non-current ...................................................................................................................... 

July 31, 2010

July 31, 2009

$

$

21 
2,582 
2,603 

$

$

213 
2,366 
2,579 

The Company recorded a valuation allowance during the year ended July 31, 2010 and 2009 equal to domestic and 
certain foreign net deferred tax assets. The Company believes that the valuation allowance is necessary as it is not more 
likely than not that the deferred tax assets will be realized in the foreseeable future based on positive and negative 
evidence available at this time. This conclusion was reached because of uncertainties relating to future taxable income, in 
terms of both its timing and its sufficiency, which would enable the Company to realize the deferred tax assets.  

As of July 31, 2010, the Company had U.S. federal net operating loss carryforwards of approximately $65.1 million. The 
U.S. federal tax loss carryforwards, if not fully utilized, expire between 2011 and 2030. Utilization is dependent on 
generating sufficient taxable income prior to expiration of the tax loss carryforwards. As of July 31, 2010, the Company 
had state and local tax loss carryforwards of approximately $76.1 million. As of July 31, 2010, the Company had foreign 
loss carryforwards of approximately $1.0 million.

As a result of certain acquisitions approximately $1.4 million of the Company’s U.S. federal net operating loss 
carryforwards are subject to an annual limitation under Internal Revenue Code Section 382 due to the ownership change. 
However, management does not believe that such a change would have a significant impact on the Company’s ability to 
utilize its tax loss carryforwards.

The components of loss before income taxes consisted of the following for the years ended July 31:  

In 000’s
United States operations................................................................................. 
International operations................................................................................... 
Loss before taxes............................................................................................ 

2010

2009

$ (19,642)  $ (21,221)  $

2008
(9,605)
(1,287)
$ (22,261)  $ (23,477)  $ (10,892)

(2,619) 

(2,256) 

The benefit (provision) for income taxes were at rates different from U.S. federal statutory rates for the following reasons:

Year ended July 31,
Federal statutory rate ...................................................................................... 
Expenses not deductible for income tax return purposes............................... 
State income taxes, net of (benefit) of federal tax deduction.......................... 
Change in valuation allowance ....................................................................... 
Reversal of tax reserve ................................................................................... 
Other ............................................................................................................... 

2010 

34%   
(1.5)%  
0.1%   
(32.3)%  
0.5%   
(0.7)%  
0.1%   

2009

34% 
(0.4)%
2.5% 
(37.8)%
— 
1.3% 
(0.4)%

2008

34%
(1.1)%
1.4%
(32.9)%
— 
0.8 
2.2%

U.S. federal income taxes have not been provided on the undistributed earnings of approximately $156,000 at July 31, 
2010 of the Company’s foreign subsidiaries, because the determination of the amount of unrecognized US federal income 
tax liability with respect to such earnings is not material.  

F-21

 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
  
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

The Company adopted the accounting standard related to unrecognized tax benefits on August 1, 2007. The cumulative 
effect of adopting the standard did not have a material impact on the Company’s financial position or results of operations. 
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:  

In 000’s   
Balance at August 1, 2009 ................................................. 
Additions for tax positions related to prior years ................ 
Additions for tax positions related to current year.............. 
Reductions for lapse of statute of limitations ..................... 
Tax audit settlements ......................................................... 
Balance at July 31, 2010.................................................... 

$

$

110 
—
—
(97)
(6)
7 

Interest and penalties related to income tax liabilities are included in income tax expense. During the fiscal year ended 
July 31, 2010, the Company recognized a net decrease of approximately $22,000. The Company has accrued 
approximately $1,000 for the payment of interest and penalties as of July 31, 2010 and had accrued approximately 
$24,000 as of July 31, 2009.  

The Company files income tax returns in the U.S. Federal jurisdiction, various U.S. state jurisdictions and several foreign 
jurisdictions. With few exceptions, the years that remain subject to examination are fiscal July 31, 2007 through fiscal 
2009.

Note 10 – Accrued Liabilities and Other Current Liabilities 

At July 31, 2010 and 2009, accrued liabilities consist of:  

In 000’s
Legal......................................................................................................................................... 
Payroll, benefits, severance and commissions ........................................................................ 
Research and development ..................................................................................................... 
Professional fees...................................................................................................................... 
Outside reference lab testing ................................................................................................... 
Other ........................................................................................................................................ 

At July 31, 2010 and 2009, other current liabilities consist of:

In 000’s
Deferred revenue ..................................................................................................................... 
Other ........................................................................................................................................ 

2010
877 
4,012 
716 
963 
194 
1,747 
8,509 

2010
496 
76 
572 

$

$

$

$

2009
1,095 
2,737
656 
1,752 
65 
2,121 
8,426 

2009
850 
212 
1,062 

$

$

$

$

Self-Insured Medical Plan

Beginning in February 2010 in an attempt to offset the cost of rising health care expenses, the Company began self-
funding medical insurance coverage for certain of its U.S. based employees. The risk to the Company is being limited 
through the use of individual and aggregate stop loss insurance. As of July 31, 2010, the Company has established a 
reserve of $0.6 million, which is included in accrued liabilities, for claims that have been reported but not paid and incurred
but not reported. The reserve is based upon the Company’s historical payment trends, claim history and current 
estimates.  

F-22

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009  

Note 11 – Stockholders’ equity 

Common stock

In June 2009, the Company issued 202,196 shares of common stock at a fair value of $1.0 million in connection with the 
Biomol earn-out of $2.5 million, and in May 2008 issued 352,000 shares of common stock at a fair value of $3.0 million in 
connection with the acquisition of Biomol (see Note 2).  

Treasury stock

In fiscal 2010, the Company issued 111,706 shares from treasury stock for its employees’ 401(k) matched contributions 
obligation. The Company recorded approximately $1.6 million, the average acquisition cost of the shares, as a reduction 
of treasury stock.  

In fiscal 2009, the Company issued 142,150 shares from treasury stock for its employees’ 401(k) matched contributions 
obligation. The Company recorded approximately $2.0 million, the average acquisition cost of the shares, as a reduction 
of treasury stock.  

In fiscal 2009, certain officers of the Company exercised 206,576 stock options in a non-cash transaction. The officers 
surrendered 99,985 shares of previously acquired common stock to exercise the stock options. The Company recorded 
approximately $1.1 million, the market value of the surrendered shares, as treasury stock.  

In fiscal 2008, certain officers and a director of the Company exercised 220,158 stock options in a non-cash transaction. 
The officers and director surrendered 181,263 previously owned shares of the Company’s common stock to exercise the 
stock options. The Company recorded approximately $2.4 million, the market value of surrendered shares, as treasury 
stock.  

Incentive stock option plans

The Company has incentive stock option plans (the “1994 Plan” and “1999 Plan”) and an incentive stock option and 
restricted stock award plan (the “2005 Plan”), collectively the “Plans”, under which the Company may grant options for up 
to 1,336,745 common shares under the 1994 plan, options for up to 2,312,356 common shares under the 1999 Plan and 
options and restricted stock awards for up to 1,000,000 common shares under the 2005 Plan. No additional options may 
be granted under the 1994 or 1999 Plans. The exercise price of options granted under such plans is equal to or greater 
than fair market value of the common stock on the date of grant. The options granted pursuant to the plans may be either 
incentive stock options or non statutory options. Stock options generally become exercisable at 25% per year after one 
year and expire ten years after the date of grant. The 2005 Plan provides for the issuance of restricted stock and 
restricted stock unit awards which generally vest over a two to four year period.  

As of July 31, 2010, there were approximately 169,000 shares available for grant under the Company’s 2005 Plan.  

A summary of the information pursuant to the Company’s stock option plans for the years ended July 31, 2010, 2009, and 
2008 is as follows:  

2010

2009

2008

Weighted -
Average
Exercise
Price

Options

Weighted -
Average
Exercise
Price

Options

Weighted -
Average
Exercise
Price

Options

Outstanding at beginning of year 
................................................. 
Granted  ...................................... 
Exercised .................................... 
Cancelled  ................................... 
Outstanding at end of year ......... 
Exercisable at end of year .......... 
Weighted average fair value of 

options granted during year  .... 

$
  1,191,519 
$
— 
— 
$
(59,069)  $
$
$

  1,132,450 
  1,132,450 

14.41 
— 
— 
16.14 
14.30 
14.30 

2,275,415 
— 

$
$
(251,162)  $
(832,734)  $
$
1,191,519 
$
1,191,519 

$

— 

F-23

13.13 
— 
5.87 
13.87 
14.41 
14.41 

— 

  2,700,457 
— 

$
$
(267,345)  $
(157,697)  $
$
$

  2,275,415 
  2,250,483 

13.32
—
10.80
20.42
13.13
13.12

$

—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

The aggregate intrinsic value of stock options exercised during the years ended July 31, 2010, 2009 and 2008, including 
the non-cash transactions (see Note 3) was $0, $1.4 million and $0.7 million, respectively. There is no aggregate intrinsic 
value of options both outstanding and exercisable at July 31, 2010.  

The following table summarizes information for stock options outstanding at July 31, 2010: 

Options outstanding and exercisable 

Range of Exercise prices
$8.33-12.25  ...........................................
$12.93-19.02  .........................................
$20.20-24.84  .........................................

Shares
611,684
494,718
26,048
1,132,450

Restricted Stock Awards

Weighted- Average
Remaining
Contractual Life in
years
1.75
4.0
1.25

Weighted- 
Average Exercise 
Price
11.90
16.90
21.54

$
$
$

During fiscal 2010, 2009 and 2008, the compensation committee of the Company’s board of directors approved grants of 
restricted stock and restricted stock unit awards (the “Awards”), respectively, under the 2005 Plan to the Company’s 
directors, certain officers and employees. The Awards vest upon the recipient’s continued employment or director service 
ratably over either two, three or four years. Share-based compensation expense is based on the fair value of the award as 
measured on the grant date and is recorded over the vesting period on a straight-line basis. The Awards will be forfeited if 
the recipient ceases to be employed by or serve as a director of the Company, as defined in the Award grants. The 
Awards settle in shares of the Company’s common stock on a one-for-one basis. As of July 31, 2010, 417,578 shares 
were unvested.  

A summary of the information pursuant to the Company’s Restricted Stock Awards for the years ended July 31, 2010, 
2009 and 2008 is as follows: 

2010

2008

2007

Outstanding at beginning of year  ...
Awarded  .........................................
Vested  ............................................
Forfeited  .........................................
Outstanding at end of year .............
Weighted average market value of 
awards granted during year  ........

Note 12 - Employee benefit plan  

Awards
377,400
241,610
(192,845)
(8,587)
417,578

Weighted -
Average
Award Price
6.05
$
5.54
$
6.46
$
9.29
$
5.50
$

$

5.54

Awards
220,240
291,801
(128,941)
(5,700)
377,400

Weighted -
Average
Award Price
12.34
$
4.05
$
12.11
$
10.18
$
6.05
$

$

4.05

Awards
141,062
160,140
(70,962)
(10,000)
220,240

Weighted -
Average
Award Price
14.15
11.42
13.55
14.73
12.34

$
$

$

$

11.42

The Company has a qualified Salary Reduction Profit Sharing Plan (the “Plan”) for eligible U.S. employees under Section 
401(k) of the Internal Revenue Code. The Plan provides for voluntary employee contributions through salary reduction 
and voluntary employer contributions at the discretion of the Company. For the years ended July 31, 2010, 2009, and 
2008, the Company authorized employer matched contributions of 50% of the employees’ contribution up to 10% of the 
employees’ compensation, payable in Enzo Biochem, Inc. common stock. The 401(k) employer matched contributions 
and accrued expense was approximately $1,115,000, $582,000, and $481,000, in fiscal years 2010, 2009, and 2008, 
respectively.  

F-24

ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

The Company’s Swiss operations provide a pension plan under the Swiss government’s social security system for Swiss 
employees. Employees are required to contribute based on a formula and the Company’s Swiss operations make 
contributions of at least 50% of the employee contribution. During the years ended July 31, 2010, 2009 and 2008, the 
employer contributions related to the Swiss benefit pension plan was approximately $408,000, $399,000 and $325,000, 
respectively.  

Pension expense at the other international operations was approximately $36,000, $36,000 and $3,000 for the years 
ended July 31, 2010, 2009 and 2008, respectively.  

Note 13 – Royalty and other income  

The Company has a license agreement with QIAGEN Gaithersburg Inc. (“Qiagen”) formerly Digene Corporation that 
began in 2005, whereby the Company earns quarterly running royalties on the net sales of Qiagen products subject to the 
license until the expiration of the patent on April 24, 2018. During the years ended July 31, 2010, 2009 and 2008, the 
Company recorded royalty income under the Agreement of approximately $6.8 million, $6.7 million and $5.5 million, 
respectively, which is included in the Life Sciences segment.  

Note 14 - Licensing and Supply Agreement: 

On April 27, 2007 (the “Effective Date”) Enzo Life Sciences, Inc. (“Life Sciences”) and Abbott Molecular Inc. (“Abbott”) 
entered into a 5 year agreement covering the supply of certain of Enzo Life Sciences products to Abbott for use in their 
product line. The parties also entered into a limited non-exclusive royalty bearing cross-licensing agreement (“Licensing 
Agreement”) for various patents. The Licensing Agreement requires each party to pay royalties, as defined through the 
lives of the related covered patents. In connection with a component of the License Agreement, Abbott paid a one-time 
fee of $1.5 million relating to a fully paid-up license and sublicense, as defined. The one-time fee will be recognized as 
revenue through August 31, 2010 representing the longest expected patent life of the related patents. At July 31, 2010 
and 2009, the Company’s balance sheet includes current deferred revenue of approximately $0.1 million and $0.5 million, 
respectively relating to the onetime fee. During the years ended July 31, 2010, 2009 and 2008, the Company recorded 
approximately $3.0 million, $2.7 million and $2.1 million, respectively, in royalties and license fee income under the 
Licensing Agreement.  

F-25

ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

Note 15 – Commitments  

Leases

The Company leases equipment, office and laboratory space under several non-cancelable operating leases that expire 
between August 2010 and May 2020. Certain leases include renewal options and rent escalation clauses. An entity 
owned by certain executive officers/directors of the Company owns the building that the Company leases as its main 
facility for laboratory operations and certain research operations. In March 2005, the Company amended and extended 
the lease for another 12 years. In addition to the minimum annual rentals of space, the lease is subject to annual 
increases, based on the consumer price index. Annual increases are limited to 3% per year. Rent expense, inclusive of 
real estate taxes, approximated $1,470,000, $1,424,000, and $1,395,000 during fiscal years 2010, 2009, and 2008.  

Total rent expense incurred by the Company during fiscal 2010, 2009 and 2008 was approximately $4,076,000, 
$3,818,000, and $2,885,000, respectively. Minimum future annual rentals under non-cancelable operating leases, net of 
sublease rental income of $398,000 as of July 31, 2010, are as follows:  

Years ended July 31,

In 000’s
2011  $ 4,718
3,836
2012 
3,271
2013 
2,780
2014 
2,593
2015 
Thereafter 
6,640
  $ 23,838

Employment Agreements 

The Company has employment agreements with certain officers that are cancelable at any time but provide for severance 
pay in the event an officer is terminated by the Company without cause, as defined in the agreements. Unless cancelled 
earlier, the contracts expire through May 2012. Aggregate minimum compensation commitments, exclusive of any 
severance provisions, for the years ending July 31, 2011 and 2012 are $1,530,000 and $1,211,000, respectively.  

Note 16– Contingencies  

In October 2002, the Company filed suit in the United States District Court of the Southern District of New York against 
Amersham plc, Amersham Biosciences, Perkin Elmer, Inc., Perkin Elmer Life Sciences, Inc., Sigma-Aldrich Corporation, 
Sigma Chemical Company, Inc., Molecular Probes, Inc. and Orchid Biosciences, Inc. In January 2003, the Company 
amended its complaint to include defendants Sigma Aldrich Co. and Sigma Aldrich, Inc. The counts set forth in the suit 
are for breach of contract; patent infringement; unfair competition under state law; unfair competition under federal law; 
tortious interference with business relations; and fraud in the inducement of contract. The complaint alleges that these 
counts arise out of the defendants’ breach of distributorship agreements with the Company concerning labeled nucleotide 
products and technology, and the defendants’ infringement of patents covering the same. In April, 2003, the court directed 
that individual complaints be filed separately against each defendant. The defendants have answered the individual 
complaints and asserted a variety of affirmative defenses and counterclaims. Fact discovery is ongoing. The court issued 
a claim construction opinion on July 10, 2006. The Company and Sigma Aldrich (“Sigma”) entered into a Settlement 
Agreement and Release effective September 15, 2006 (the “Agreement”). Pursuant to the Agreement, the Company’s 
litigation with Sigma was dismissed and the Company recognized $2 million on settlement in the quarter ending October 
31, 2006. On January 3, 2007, the remaining defendants moved for summary judgment on all counts in the individual 
complaints. During a two-day hearing held on July 17 through July 18, 2007, the defendants subsequently withdrew the 
invalidity portion of their summary judgment motions. On March 13, 2009, the court denied defendants’ summary 
judgment motion and stayed the cases pending resolution of an appeal to the United States Court of Appeals for the 
Federal Circuit in Enzo’s Connecticut litigation against Applera Corporation and Tropix, Inc. On March 26, 2010, the 
United States Court of Appeals for the Federal Circuit reversed the District of Connecticut’s grant of summary judgment of 
invalidity as to various patents at issue in the Applera case, and remanded the Applera case for further proceedings 
consistent with the Federal Circuit’s opinion.  

F-26

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

In light of the Federal Circuit’s remand of the Applera case to the District of Connecticut and the impending trial, on May 
27, 2010, the court maintained its stay of the cases until further notice. There can be no assurance that the Company will 
be successful with the remaining outstanding litigation. However, even if the Company is not successful, management 
does not believe that there will be a significant adverse monetary impact to the Company. The Company has not recorded 
revenue under these distribution agreements in the past five fiscal years. The Company recorded other income from 
Perkin Elmer in fiscal 2007.  

On October 28, 2003, the Company and Enzo Life Sciences, Inc., filed suit in the United States District Court of the 
Eastern District of New York against Affymetrix, Inc (“Affymetrix”). The Complaint alleges that Affymetrix improperly 
transferred or distributed substantial business assets of the Company to third parties, including portions of the Company’s 
proprietary technology, reagent systems, detection reagents and other intellectual property. The Complaint also charges 
that Affymetrix failed to account for certain shortfalls in sales of the Company’s products, and that Affymetrix improperly 
induced collaborators and customers to use the Company’s products in unauthorized fields or otherwise in violation of the 
agreement. The Complaint seeks full compensation from Affymetrix to the Company for its substantial damages, in 
addition to injunctive and declaratory relief to prohibit, among other things, Affymetrix’s unauthorized use, development, 
manufacture, sale, distribution and transfer of the Company’s products, technology, and/or intellectual property, as well as 
to prohibit Affymetrix from inducing collaborators, joint venture partners, customers and other third parties to use the 
Company’s products in violation of the terms of the agreement and the Company’s rights. Subsequent to the filing of the 
Complaint against Affymetrix, Inc. referenced above, on or about November 10, 2003, Affymetrix, Inc. filed its own 
Complaint against the Company and its subsidiary, Enzo Life Sciences, Inc., in the United States District Court for the 
Southern District of New York, seeking among other things, declaratory relief that Affymetrix, Inc., has not breached the 
parties’ agreement, that it has not infringed certain of Enzo’s Patents, and that certain of Enzo’s patents are invalid. The 
Affymetrix Complaint also seeks damages for alleged breach of the parties’ agreement, unfair competition, and tortuous 
interference, as well as certain injunction relief to prevent alleged unfair competition and tortuous interference. The 
Company does not believe that the Affymetrix Complaint has any merit and intends to defend vigorously. Affymetrix also 
moved to transfer venue of Enzo’s action to the Southern District of New York, where other actions commenced by Enzo 
were pending as well as Affymetrix’s subsequently filed action. On January 30, 2004, Affymetrix’s motion to transfer was 
granted. Accordingly, the Enzo and Affymetrix actions are now both pending in the Southern District of New York. Initial 
pleadings have been completed and discovery has commenced. The Court issued a Markman (claim construction) 
opinion on July 10, 2006. On January 3, 2007, Affymetrix moved for summary judgment on all counts of the Complaint. A 
two-day hearing on Affymetrix’s summary judgment motion was held on July 17 through July 18, 2007. On March 13, 
2009, the court denied Affymetrix’s motion and stayed the case pending resolution of an appeal in the United States Court 
of Appeals for the Federal Circuit in Enzo’s Connecticut litigation against Applera Corporation and Tropix, Inc. On March 
26, 2010, the United States Court of Appeals for the Federal Circuit reversed the District of Connecticut’s grant of 
summary judgment of invalidity as to various patents at issue in the Applera case, and remanded the Applera case for 
further proceedings consistent with the Federal Circuit’s opinion. In light of the Federal Circuit’s remand of the Applera 
case to the District of Connecticut and the impending trial, on May 27, 2010, the court maintained its stay of the Affymetrix 
case until further notice. The Company has not recorded any revenue from Affymetrix since fiscal 2003.  

On June 2, 2004, Roche Diagnostic GmbH and Roche Molecular Systems, Inc. (collectively “Roche”) filed suit in the U.S. 
District Court of the Southern District of New York against Enzo Biochem, Inc. and Enzo Life Sciences, Inc. (collectively 
“Enzo”). The Complaint was filed after Enzo rejected Roche’s latest cash offer to settle Enzo’s claims for, inter alia,
alleged breach of contract and misappropriation of Enzo’s assets. The Complaint seeks declaratory judgment (i) of patent 
invalidity with respect to Enzo’s 4,994,373 patent (the “‘373 patent”), (ii) of no breach by Roche of its 1994 Distribution and
Supply Agreement with Enzo (the “1994 Agreement”), (iii) that non-payment by Roche to Enzo for certain sales of Roche 
products does not constitute a breach of the 1994 Agreement, and (iv) that Enzo’s claims of ownership to proprietary 
inventions, technology and products developed by Roche are without basis. In addition, the suit claims tortious 
interference and unfair competition. The Company does not believe that the Complaint has merit and intends to vigorously 
respond to such action with appropriate affirmative defenses and counterclaims. Enzo filed an Answer and Counterclaims 
on November 3, 2004 alleging multiple breaches of the 1994 Agreement and related infringement of Enzo’s ‘373 patent. 
Discovery has commenced. The Court issued a Markman opinion on July 10, 2006. On January 3, 2007, Roche moved 
for summary judgment on all counts of the Complaint.  

F-27

ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

During a two-day hearing held on July 17 through July 18, 2007, Roche subsequently withdrew its invalidity portion of its 
summary judgment motion. On March 13, 2009, the court denied Roche’s motion and stayed the cases pending resolution 
of an appeal to the United States Court of Appeals for the Federal Circuit in Enzo’s Connecticut litigation against Applera 
Corporation and Tropix, Inc. On March 26, 2010, the United States Court of Appeals for the Federal Circuit reversed the 
District of Connecticut’s grant of summary judgment of invalidity as to various patents at issue in the Applera case, and 
remanded the Applera case for further proceedings consistent with the Federal Circuit’s opinion.  

In light of the Federal Circuit’s remand of the Applera case to the District of Connecticut and the impending trial, on May 
27, 2010, the court maintained its stay of the Roche case until further notice. The Company did not record any revenue 
from Roche since fiscal 2004. The Roche agreement remains in force to date.  

On June 7, 2004, the Company and Enzo Life Sciences, Inc., filed suit in the United States District Court for the District of 
Connecticut against Applera Corporation and its wholly-owned subsidiary Tropix, Inc. The complaint alleges infringement 
of six patents (relating to DNA sequencing systems, labeled nucleotide products, and other technology). Yale University is 
the owner of four of the patents and the Company is the exclusive licensee. These four patents are commonly referred to 
as the “Ward” patents. Accordingly, Yale is also a plaintiff in the lawsuit. Yale and Enzo are aligned in protecting the 
validity and enforceability of the patents. Enzo Life Sciences is the owner of the remaining two patents. The complaint 
seeks permanent injunction and damages (including treble damages for willful infringement). Defendants answered the 
complaint on July 29, 2004. The answer pleads affirmative defenses of invalidity, estoppels and laches and asserts 
counterclaims of non-infringement and invalidity. A Markman hearing was held on May 25, 2006 and the district court 
issued a ruling on October 12, 2006. On August 17, 2007, the Company voluntarily dismissed the infringement claims for 
one of the patents in suit without prejudice. Defendants similarly dismissed their defenses and counterclaims as to that 
patent. On the same date, the Company conceded a judgment of non-infringement for another of the patents in suit based 
on the district court’s claim construction, reserving the right to appeal their construction. The defendants filed motions for 
summary judgment for invalidity, laches and non-infringement of the Ward patents on March 5, 2007. The Company and 
other plaintiff filed a motion for summary judgment on infringement of the Ward patents on March 5, 2007. On August 20, 
2007, the district court heard oral arguments on the motions for summary judgment. On September 6, 2007, the court 
granted defendants’ motion for summary judgment of invalidity of three of the remaining Ward patents and entered 
judgment to that effect. The Company and other plaintiff filed a notice of appeal to the United States Court of Appeals for 
the Federal Circuit on September 7, 2007. On January 30, 2008, the Court of Appeals for the Federal Circuit granted the 
Company’s alternative motion to dismiss its appeal and remand to the Connecticut Court for further proceedings incident 
to an entry of a final, appealable judgment. The Company requested the Connecticut Court to dispose of all outstanding 
issues (including the Company’s claim under the fourth Ward patent and certain counterclaims of Applera’s) and enter 
final judgment. The Connecticut Court granted this request. The Company subsequently filed an Appeal on April 7, 2009. 
On March 26, 2010, the Federal Circuit issued an order concluding that the claims of U.S. Patent Nos. 5,328,824 and 
5,449,767 were not indefinite and that there were genuine issues of material fact as to anticipation. The Court reversed 
the district court’s summary judgment of invalidity of those two patents and remanded the case back to the Connecticut 
Court. Applera and Tropix then filed a combined petition for panel rehearing and rehearing en banc. On May 26, 2010, the 
Federal Circuit issued an order denying both petitions. The Defendants then filed a motion to stay the case in Connecticut 
pending resolution of its impending petition for writ of certiorari to the U.S. Supreme Court. Judge Arterton has not yet 
ruled on the stay motion. Applera filed its petition for certiorari on September 23, 2010. If the petition is not granted, there
can be no assurance that the Company will be successful in this litigation. Even if the Company is not successful, 
management does not believe that there will be a significant adverse monetary impact on the Company.  

In January 2006, the Company was named along with certain of its officers and directors among others, in several 
complaints titled Francis Scott Hunt, et al. v. Enzo Biochem Inc., et al., Index No. 06-CV-00170 (SAS) and Ken Roberts v. 
Enzo Biochem, Inc. et al., Index No. 06-CV-00213 (SAS), and Paul Lewicki v. Enzo Biochem Inc., et al., Index No. 06-CV-
06347 (SAS) based only upon a claim for common law fraud. These three consolidated actions were all filed in the United 
States District Court for the Southern District of New York (“the Court”). The actions seek damages in excess of $8 million 
and are all based on allegations of a fraudulent scheme to pump and dump Enzo securities as was initially set forth in a 
previous action (filed by the same attorney) which was dismissed by the Eastern District of Virginia and such dismissal 
was thereafter affirmed by the Fourth Circuit Court of Appeals and is now final since the U.S. Supreme Court denied a 
petition for certiorari. The Company and the other defendants likewise moved to dismiss all of the Complaints in these 
actions and that motion was granted by the Court.  

F-28

ENZO BIOCHEM, INC.  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
July 31, 2010 and 2009 

As a result, some of the Plaintiffs were no longer able to pursue their claims or choose not to pursue them further. Other 
Plaintiffs amended their Complaints and the Company and the other defendants moved once again to dismiss those 
Amended Complaints. The Court granted in part and denied in part those motions. The remaining Plaintiffs then 
conducted discovery, and following the completion of discovery, the Company and other defendants moved for summary 
judgment dismissal of the Amended Complaints. On June 5, 2009, the Court granted the defendants’ motion and 
dismissed all the Amended Complaints. The remaining Plaintiffs then filed a notice of appeal to the Second Circuit Court 
of Appeals. The appeal is still pending. The Company believes that the latest complaints in these actions have no merit 
and that the appeal also lacks merit. The Company will continue to defend these actions vigorously.  

On April 30, 2009, Shahram K. Rabbani (“Mr. Rabbani”), former Secretary, Treasurer and member of the board of 
directors of the Company and the former President of Enzo Clinical Labs, Inc., in connection with the termination of his 
employment, submitted a demand for arbitration and related statement of claim to the American Arbitration Association. 
The statement of claim named the Company, Dr. Elazar Rabbani, the Chairman of the Board and Chief Executive Officer 
of the Company, and Barry W. Weiner, the President, Chief Financial Officer of the Company and a member of the Board. 
Mr. Rabbani sought damages of no less than $10 million consisting of contractually prescribed severance payments 
(approximately $2.5 million), plus additional base salary and bonus going forward for several years, compensatory 
damages, and punitive damages, including attorneys’ fees and costs in connection with these proceedings. Subsequent to 
April 30, 2009, the Company conducted a review, as directed by a special committee of the Board of Directors, relating to 
the aforementioned Claims pertaining to Enzo Clinical Labs. The review concluded that the purported Claims were 
unsubstantiated. On January 28, 2010, the Company reached an agreement with Mr. Rabbani, to settle all of the Claims 
as well as all of his claims against Dr. Rabbani and Mr. Weiner. Under the terms of the agreement, Mr. Rabbani 
discontinued all actions he commenced against the Company, Dr. Rabbani and Mr. Weiner. In exchange, the Company 
paid Mr. Rabbani a lump sum payment of $2.7 million, inclusive of the aforementioned contractually prescribed severance 
payment. The parties also agreed to execute mutual general releases. On February 7, 2010, the parties executed the 
mutual general releases and the Company paid the aforementioned settlement of $2.7 million. During the three months 
ended January 31, 2010 the Company recorded a settlement expense of approximately $3.7 million, consisting of the 
lump sum payment of $2.7 million and approximately $1.0 million of legal expenses incurred in connection with the 
Claims.  

On January 8, 2010, Mr. Rabbani commenced, as plaintiff, an action (the “Action”) in the Supreme Court of the State of 
New York, County of New York, seeking a temporary restraining order and a preliminary and permanent injunction to 
enjoin the Company from convening the Annual Meeting on January 29, 2010. On January 11, 2010, the Company 
petitioned to remove the Action to the U.S. District Court for the Southern District of New York (the “Court”), which petition 
was granted. A hearing on the matter was held on January 12, 2010. On January 27, 2010, the Court entered an order 
denying Mr. Rabbani’s motion for a preliminary injunction to enjoin the Company from convening the Annual Meeting on 
January 29, 2010.  

On or about September 22, 2010, Mayflower Partners, L.P. f/k/a Biomol International, L.P. (“Mayflower”) filed an action 
against Enzo Biochem, Inc. and Enzo Life Sciences, Inc. (together “Enzo”) in the United States District Court for the 
Southern District of New York, alleging breach of the stock and asset purchase agreement dated as of May 8, 2008 
between Enzo and Mayflower (the “Agreement”). Pursuant to the Agreement, the Company acquired the assets of 
Mayflower, and agreed, among other things, to make certain contingent earn-out payments to Mayflower, accounted for 
as additional purchase price consideration, if certain performance thresholds were met for each of the two annual periods 
following the closing. Mayflower alleges that Enzo breached the Agreement by allegedly failing to operate the acquired 
business in good faith during the second earn-out period and engaging in conduct the primary purpose of which was to 
avoid making a second earn-out period payment under the Agreement.  

F-29

ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

In addition, Mayflower claims that Enzo breached the Agreement by allegedly failing to provide the documentation 
appropriate to support the calculation of defined financial criteria for the second earn-out period as required under the 
Agreement. Enzo denies that it is in breach of the Agreement and will vigorously defend the suit.  

As part of the litigation, Mayflower moved by Order to Show cause to enjoin the accounting procedure specified under the 
Agreement. Mayflower’s motion was heard by a District Court Judge on September 27, 2010, who directed that the parties 
first go forward with the accounting as provided under the Agreement before moving further with the litigation. As provided 
under the Agreement, Mayflower’s maximum recovery in the event that it is successful on either the accounting or in 
litigation is settlement of the $2.5 million contingent earn-out in either Enzo common stock or cash, as set forth in the 
Agreement, plus attorney’s fees.  

The Company is party to other claims, legal actions, complaints, and contractual disputes that arise in the ordinary course 
of business. The Company believes that any liability that may ultimately result from the resolution of these matters will not, 
individually or in the aggregate, have a material adverse effect on its financial position or results of operations.  

F-30

ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

Note 17 – Segment reporting  

The Company has three reportable segments: Life Sciences, Therapeutics and Clinical Labs. The Company’s Life 
Sciences segment develops, manufactures, and markets products to research and pharmaceutical customers. The 
Company’s Therapeutics segment conducts research and development activities for therapeutic drug candidates. The 
Clinical Labs segment provides diagnostic services to the health care community. The Company evaluates segment 
performance based on segment income (loss) before taxes. Costs excluded from segment income (loss) before taxes and 
reported as “Other” consist of corporate general and administrative costs which are not allocable to the three reportable 
segments.  

Management of the Company assesses assets on a consolidated basis only and therefore, assets by reportable segment 
have not been included in the reportable segments below. The accounting policies of the reportable segments are the 
same as those described in the summary of significant accounting policies.  

The following financial information (in thousands) represents the operating results of the reportable segments of the 
Company:  

Year ended July 31, 2010 

Life
Sciences

  Therapeutics

Clinical
Labs

Other 

  Consolidated 

Revenues:  
Product revenues  ....................................................  $ 43,111 
9,793 
Royalty and license fee income  .............................. 
— 
Clinical laboratory services  ..................................... 
52,904 

— 
— 
— 
— 
—  $ 44,178 
44,178 
— 

—  $
— 
— 
— 

Operating expenses:  
Cost of product revenues  ........................................ 
Cost of clinical laboratory services .......................... 
Research and development  .................................... 
Provision for uncollectible accounts receivable  ...... 
Selling, general and administrative and legal  ......... 
Litigation settlement  ................................................ 
Total operating expenses ........................................ 

22,547 
— 
7,202  $
48 
19,945 
— 
49,742 

— 
— 
2,502 
— 
— 
— 
2,502 

— 
29,570 
— 
3,432 

— 
— 
— 
— 
18,725  $  11,471 
3,698 
  15,169 

— 
51,727 

43,111
9,793
44,178
97,082

22,547
29,570
9,704
3,480
50,141
3,698
119,140

Operating income (loss)  .......................................... 

3,162 

(2,502) 

(7,549) 

(15,169) 

(22,058)

Other income (expense)  
Interest  .................................................................... 
Other  ....................................................................... 
Foreign exchange loss  ............................................ 
Income (loss) before income taxes  .........................  $

(5)   
(8)   
(266)   
2,883  $

— 
— 
— 

— 
46 
— 
(2,502)  $ (7,503)  $  (15,139)  $

24 
6 
— 

19
44
(266)
(22,261)

Depreciation and amortization included above  .......  $

3,110  $

52  $

982  $ 

125  $

4,269

Share-based compensation included in above: 

Cost of clinical laboratory services .......................  $
Research and development  ................................. 
Selling, general and administrative and legal  ...... 
Total  .....................................................................  $

— 
14 
114 
128 

—  $
— 
— 
—  $

12 
— 
78  $ 
90  $ 

—  $
— 
952 
952  $

12
14
1,144
1,170

Capital expenditures  ...............................................  $

1,450  $

11  $

1,728  $ 

62  $

3,251

F-31

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

Year ended July 31, 2009 

Life
Sciences

Therapeutics

Clinical
Labs

Other

Consolidated

Revenues: 
Product revenues  .....................................................  $
Royalty and license fee income  ............................... 
Clinical laboratory services  ...................................... 

Operating expenses: 
Cost of product revenues  ......................................... 
Cost of clinical laboratory services ........................... 
Research and development  ..................................... 
Provision for uncollectible accounts receivable  ....... 
Selling, general and administrative and legal ........... 
Total operating expenses ......................................... 

40,592 
9,376 
— 
49,968 

26,766 
— 
5,855  $
— 
14,938 
47,559 

— 
— 
— 
— 
—  $ 39,604 
  39,604 
— 

—  $
— 
— 
— 

— 
— 
3,365 
— 
— 
3,365 

— 
  26,295 
— 
5,189 

— 
— 
— 
— 
  15,498  $  15,073 
15,073 
  46,982 

40,592
9,376
39,604
89,572

26,766
26,295
9,220
5,189
45,509
112,979

Operating income (loss)  ........................................... 

2,409 

(3,365)   

(7,378) 

(15,073) 

(23,407)

Other income (expense) 
Interest  ..................................................................... 
Other  ........................................................................ 
Foreign exchange loss  ............................................. 
Income (loss) before income taxes  ..........................  $

— 
25 
(725)   
1,709  $

— 
— 
— 

57 
49 
— 

(3,365)  $ (7,272)  $ 

524 
— 
— 
(14,549)  $

581
74
(725)
(23,477)

Depreciation and amortization included above  ........  $

2,350  $

50  $

946  $ 

116  $

3,462

Share-based compensation included in above: 

Cost of clinical laboratory services ........................ 
Research and development  ..................................  $
Selling, general and administrative and legal  ....... 
Total  ......................................................................  $

— 
13 
128  $
141 

—  $
— 
119 
119  $

8 
— 

135  $ 
143  $ 

—  $
— 
1,032 
1,032  $

8
13
1,414
1,435

Capital expenditures  ................................................  $

1,334  $

78  $

1,253  $ 

44  $

2,709

F-32

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

Year ended July 31, 2008 

Life
Sciences

Therapeutics

Clinical
Labs

Other

Consolidated

Revenues: 
Product revenues  .................................................... 
Royalty and license fee income  .............................. 
Clinical laboratory services  ..................................... 

Operating expenses: 
Cost of product revenues  ........................................ 
Cost of clinical laboratory services .......................... 
Research and development  .................................... 
Provision for uncollectible accounts receivable  ...... 
Selling, general and administrative and legal  ......... 

$ 28,087 
7,630 
— 
  35,717 

  19,159 
— 
3,473 
— 
9,779 

— 
— 
— 
— 

— 
— 
$ 42,078 
  42,078 

$

— 
— 
— 
— 

$

— 
— 
5,164 
— 
— 

— 
  22,209 
— 
3,716 
  14,349 

— 
— 
— 
— 
$  14,732 

28,087 
7,630 
42,078 
77,795 

19,159 
22,209 
8,637 
3,716 
38,860 

Total operating expenses ........................................ 

  32,411 

5,164 

  40,274 

14,732 

92,581 

Operating income (loss)  .......................................... 

3,306 

(5,164) 

1,804 

(14,732) 

(14,786)

Other income (expense) 
Interest  .................................................................... 
Other  ....................................................................... 
Foreign exchange loss  ............................................ 
Income (loss) before income taxes  ......................... 

— 
71 
27 
$ 3,404 

Depreciation and amortization included above  ....... 

$ 1,138 

Share-based compensation included in above: 

Cost of clinical laboratory services ....................... 
Research and development  ................................. 
Selling, general and administrative and legal  ...... 
Total  ..................................................................... 

$

$

8 
34 
129 
171 

$

$

$

Capital expenditures  ............................................... 

$ 2,308 

$

Geographic financial information is as follows (in thousands): 

— 
100 
— 

239 
— 
— 
(5,064 )  $ 2,043 

3,457 
— 
— 

$  (11,275)  $

3,696 
171 
27 
(10,892)

35  

$

853 

$ 

120 

$

2,146 

— 
63 
— 
63  

63  

$

$

$

6 
— 
247 
253 

797 

— 
— 
1,079 
1,079 

63 

$

$

$

$ 
$ 

$ 

14 
97 
1,455 
1,566 

3,231 

Net sales to unaffiliated customers: 

2010 

2009 

2008 

United States ...................................................................... 
Switzerland ......................................................................... 
United Kingdom .................................................................. 
Other international countries .............................................. 
Total  ................................................................................... 

$ 82,873 
7,037 
2,507 
4,665 
$ 97,082 

$ 75,936 
6,487 
2,517 
4,632 
$ 89,572 

$  62,243 
9,142 
2,127 
4,283 
$  77,795 

Long-lived assets at July 31, 

2010 

2009 

2008 

United States ...................................................................... 
Switzerland ......................................................................... 
United Kingdom .................................................................. 
Other international countries .............................................. 
Total  ................................................................................... 

$ 45,439 
7,063 
2,944 
1,723 
$ 57,169 

$ 45,896 
7,075 
3,334 
1,923 
$ 58,228 

$  34,202 
7,437 
4,193 
2,198 
$  48,030 

F-33

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC. 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
July 31, 2010 and 2009 

The Company’s reportable segments are determined based on the services they perform, the products they sell, and the 
royalties and license fee income they earn, not on the geographic area in which they operate. The Company’s Clinical 
Labs segment operates 100% in the United States with all revenue derived there. The Life Sciences segment earns 
product revenue both in the United States and foreign countries and royalty and license fee income in the United States. 
The following is a summary of the Life Sciences segment revenues attributable to customers located in the United States 
and foreign countries:  

In 000’s 
United States .......................................................................................................... 
Foreign countries  ................................................................................................... 

2010 
$ 38,695 
  14,209 
$ 52,904 

2009 
$  36,332 
  13,636 
$  49,968 

2008 
$ 20,165 
  15,552 
$ 35,717 

Note 18 – Summary of Selected Quarterly Financial Data (unaudited)  

The following table contains statement of operations information for each quarter of the years ended July 31, 2010 and 
2009. The Company believes that the following information reflects all normal recurring adjustments necessary for a fair 
presentation of the information for the periods presented. The operating results for any quarter are not necessarily 
indicative of results for any future period.  

Unaudited quarterly financial data (in thousands, except per share amounts) for fiscal 2010 and 2009 is summarized as 
follows:  

Quarter Ended 

$

October 31,
2009
25,165 
13,329 
(1,893) 
(1,814) 

$

January 31,
2010
23,186 
10,885 
(10,210) 
(10,328) 

April 30,
2010
$  23,786 
  10,529 
(4,401) 
(4,578) 

$
$

(0.05)  $
(0.05)  $

(0.27)  $ 
(0.27)  $ 

(0.12)  $
(0.12)  $

Quarter Ended 

$

October 31,
2008
21,064 
8,168 
(6,232) 
(6,370) 

$

January 31,
2009
20,916 
8,011 
(7,567) 
(7,673) 

April 30,
2009
$  23,061 
9,539 
(4,226) 
(4,242) 

$
$

(0.17)  $
(0.17)  $

(0.20)  $ 
(0.20)  $ 

(0.11)  $
(0.11)  $

July 31,
2010
$ 24,945 
  10,222
(5,757)
(5,513)
(0.15)
(0.15)

July 31,
2009
$ 24,531 
  10,793 
(5,452)
(5,279)
(0.14)
(0.14)

Fiscal 2010 
Total revenues  .............................................................................. 
Gross profit .................................................................................... 
Loss before income taxes  ............................................................. 
Net loss  ......................................................................................... 
Basic loss per common share  ....................................................... 
Diluted loss per common share ..................................................... 

Fiscal 2009 
Total revenues  .............................................................................. 
Gross profit .................................................................................... 
Loss before income taxes  ............................................................. 
Net loss  ......................................................................................... 
Basic loss per common share  ....................................................... 
Diluted loss per common share ..................................................... 

F-34

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ENZO BIOCHEM, INC 
SCHEDULE II 
VALUATION AND QUALIFYING ACCOUNTS 
Years ended July 31, 2010, 2009 and 2008 
(in thousands) 

Year ended 
July 31,

Description

Balance at
Beginning
of period

Charged
to
costs
and expenses

Charged
to other

accounts Deductions

Balance at
end of period

2010 

  Allowance for doubtful accounts receivable ..... 

4,786 

3,480 

—   

5,427(1)

2,839

2009 

  Allowance for doubtful accounts receivable ..... 

886 

5,189 

—   

1,289(1)

4,786

2008 

  Allowance for doubtful accounts receivable ..... 

1,404 

3,716 

—   

4,234(1)

886

2010 

  Deferred tax valuation allowance ..................... 

21,716 

7,185 

2009 

  Deferred tax valuation allowance ..................... 

12,965 

8,751 

2008 

  Deferred tax valuation allowance ..................... 

9,385 

3,580 

2010 

  Reserve for obsolete inventory  ........................ 

2,477 

1,344 

2009 

  Reserve for obsolete inventory  ........................ 

2,109 

2008 

  Reserve for obsolete inventory  ........................ 

1,851 

378 

283 

—   

—   

—   

—   

—   

—   

— 

— 

— 

— 

28,901

21,716

12,965

3,821

10(2)

2,477

25(2)

2,109

(1) 

(2) 

Write-off of uncollectible accounts receivable. 

Write-off of obsolete inventory 

S-1

  
 
 
 
   
 
  
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
EXHIBIT 23 

Consent of Independent Registered Public Accounting Firm  

We consent to the incorporation by reference in the following Registration Statements:  

(1) 

Registration Statement (Form S-8 No. 333-87153, 333-89308 and 333-123712) pertaining to the1999 
Stock Option Plan and the 2005 Equity Compensation Incentive Plan;  

(2) 

Registration Statement (Form S-3 No. 333-168311) 

of our report dated October 14, 2010, with respect to the consolidated financial statements and schedule of Enzo 
Biochem, Inc., and our report dated October 14, 2010, with respect to the effectiveness of internal control over financial 
reporting of Enzo Biochem, Inc., included in this Annual Report (Form 10-K) of Enzo Biochem, Inc. 

/s/ Ernst & Young LLP

Jericho, New York  
October 14, 2010 

S-2

CERTIFICATIONS

EXHIBIT 31 (a) 

In connection with the Annual Report on Form 10-K of Enzo Biochem, Inc. (“the Company”) for the fiscal year ended July 31, 2010
as filed with the Securities and Exchange Commission on the date hereof, I, Elazar Rabbani, Ph.D., Chief Executive Officer of the 
Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 302 of the Sarbanes-Oxley Act of 2002, that:  

1. 

2. 

3. 

4. 

I have reviewed this Annual Report on Form 10-K of Enzo Biochem, Inc.  

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report;  

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all
material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods 
presented in this report;  

The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a – 15(e) and 15d – 15(e)) and internal control over financial reporting (as 
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:  

(a) 

(b) 

(c) 

(d) 

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed 
under our supervision, to ensure that material information relating to the Company, including its consolidated 
subsidiaries, is made known to us by others within those entities, particularly during the period in which this report 
is being prepared;  

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and 
the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles;  

Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by 
this report based on such evaluation; and  

Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during 
the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that 
has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial 
reporting; and  

5. 

The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons 
performing the equivalent functions):  

(a) 

(b) 

All significant deficiencies and material weaknesses in the design or operation of internal control over financial 
reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and 
report financial information; and  

Any fraud, whether or not material, that involves management or other employees who have a significant role in the 
Company’s internal control over financial reporting.  

Date: October 14, 2010 

By: /s/ Elazar Rabbani, Ph.D.  
Elazar Rabbani, Ph.D.  
Chief Executive Officer  

S-3

 
 
CERTIFICATIONS

EXHIBIT 31 (b)  

In connection with the Annual Report on Form 10-K of Enzo Biochem, Inc. (“the Company”) for the fiscal year ended July 31, 2010
as filed with the Securities and Exchange Commission on the date hereof, I, Barry Weiner, Chief Financial Officer and Principal
Accounting Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 302 of the Sarbanes-Oxley Act of 
2002, that:  

1. 

2. 

3. 

4. 

I have reviewed this Annual Report on Form 10-K of Enzo Biochem, Inc.  

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report;  

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all
material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods 
presented in this report;  

The Company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a – 15(e) and 15d – 15(e)) and internal control over financial reporting (as 
defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:  

(a) 

(b) 

(c) 

(d) 

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed 
under our supervision, to ensure that material information relating to the Company, including its consolidated 
subsidiaries, is made known to us by others within those entities, particularly during the period in which this report 
is being prepared; 

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and 
the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles;  

Evaluated the effectiveness of the Company’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by 
this report based on such evaluation; and  

Disclosed in this report any change in the Company’s internal control over financial reporting that occurred during 
the Company’s most recent fiscal quarter (the Company’s fourth quarter in the case of an annual report) that has 
materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial 
reporting; and  

5. 

The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons 
performing the equivalent functions):  

(a) 

(b) 

All significant deficiencies and material weaknesses in the design or operation of internal control over financial 
reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize and 
report financial information; and  

Any fraud, whether or not material, that involves management or other employees who have a significant role in the 
Company’s internal control over financial reporting.  

Date: October 14, 2010  

By: /s/ Barry Weiner  
Barry Weiner  
Chief Financial Officer and Principal  
Accounting Officer  

S-4

 
 
 
CERTIFICATE PURSUANT TO  
18 U.S.C. SECTION 1350,  
AS ADOPTED PURSUANT TO 
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 32 (a) 

In connection with the Annual Report of Enzo Biochem, Inc., and Subsidiaries (“the Company”) on Form 10-K for the fiscal 
year ended July 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Elazar Rabbani, 
Ph.D., Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-
Oxley Act of 2002, that:  

(1) 

(2) 

The Report fully complies with the requirements of Section 13 (a) or 15 (d) of the Securities Exchange Act of 
1934; and  

The information contained in the Report fairly presents, in all material respects, the financial condition and 
results of operations of the Company.  

Dated: October 14, 2010  

By: /s/ Elazar Rabbani, Ph.D.

Elazar Rabbani, Ph.D.  
Chief Executive Officer  

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or 

otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 
906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Act 
Commission or its staff upon request.  

S-5

CERTIFICATE PURSUANT TO  
18 U.S.C. SECTION 1350,  
AS ADOPTED PURSUANT TO 
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 32 (b)  

In connection with the Annual Report of Enzo Biochem, Inc., and Subsidiaries (“the Company”) on Form 10-K for the fiscal 

year ended July 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Barry Weiner, 
Chief Financial Officer and Principal Accounting Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant 
to § 906 of the Sarbanes-Oxley Act of 2002, that: 

(1) 

(2) 

The Report fully complies with the requirements of Section 13 (a) or 15 (d) of the Securities Exchange Act of 
1934; and  

The information contained in the Report fairly presents, in all material respects, the financial condition and 
results of operations of the Company.  

Date: October 14, 2010 

By: /s/ Barry Weiner  
Barry Weiner  
Chief Financial Officer and Principal  
Accounting Officer  

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or 

otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 
906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Act 
Commission or its staff upon request.  

S-6

 
 
 
Performance Graph 

The graph below compares the five-year cumulative shareholder total return based upon an initial 
$100  investment  (assuming  the  reinvestment  of  dividends)  for  Enzo  Biochem,  Inc.  shares  of  Common 
Stock  with  the  comparable  return  for  the  New  York  Stock  Exchange  Market  Value  Index  and  two  peer 
issuer  indices  selected  on  an  industry  basis.  The  two  peer  group  indices  include:  (i)  67  biotechnology 
companies  engaged  in  the  research  and  development  of  diagnostic  substances  and  (ii)  42  companies 
engaged  in  the  medical  laboratories  business.  All  of  the  indices  include  only  companies  whose  common 
stock  has  been  registered  under  Section  12  of  the  Securities  Exchange  Act  of  1934  for  at  least  the  time 
frame set forth in the graph. 

The total shareholder returns depicted in the graph are not necessarily indicative of future 

performance. The Performance Graph and related disclosure shall not be deemed to be incorporated by 
reference in any filing by the Company under the Securities Act of 1933 or the Securities Exchange Act of 
1934, except to the extent that the Company specifically incorporates the graph and such disclosure by 
reference. 

 COMPARISON OF 5-YEAR CUMULATIVE TOTAL RETURN
AMONG ENZO BIOCHEM, INC.,
NYSE MARKET INDEX AND SIC CODE INDEXES

S
R
A
L
L
O
D

150

125

100

75

50

25

0
2005

2006

2007

2008

2009

2010

ENZO BIOCHEM, INC.

MEDICAL LABORATORIES

NYSE COMPOSITE INDEX

DIAGNOSTIC SUBSTANCES

ASSUMES $100 INVESTED ON AUGUST 1, 2005
ASSUMES DIVIDEND REINVESTED
FISCAL YEAR ENDING JULY 31, 2010

COMPARISON OF CUMULATIVE TOTAL RETURN OF ONE OR MORE 
COMPANIES, PEER GROUPS, INDUSTRY INDEXES AND/OR BROAD MARKETS 

                              ------------------------ FISCAL YEAR ENDING ---------------------- 
COMPANY/MARKET/PEER GROUP      7/31/2005  7/31/2006  7/31/2007  7/31/2008  7/31/2009  7/31/2010 

Enzo Biochem Inc                  100.00      76.82      76.16      84.68      30.39      27.41 
NYSE Composite Index              100.00     112.69     133.44     120.66      94.71     105.58 
Diagnostic Substances             100.00     100.71     114.80     122.09      93.64     112.73 
Medical Laboratories              100.00     110.81     120.14     122.43     108.48     105.73 

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[THIS PAGE INTENTIONALLY LEFT BLANK] 

Corporate Information 

Board of Directors 

Officers and Management 

Corporate Office 

Gregory M. Bortz 
Founder and Manager Partner 
Creo Capital Partners, LLC 

Irwin C. Gerson 
Chairman Emeritus, Lowe 
McAdams Healthcare Division 
of the Interpublic Group 

Bernard L. Kasten, MD. 
Chairman, Cleveland Biolabs, Inc. 
Former Chief Laboratory Officer, 
Quest Diagnostics, Inc. 
Former CEO, Siga Technologies, Inc. 

Stephen B. H. Kent, Ph.D. 
Professor of Biochemistry and  
Molecular Biology, University of Chicago 
Former CEO and President, Gryphon 
Sciences

Elazar Rabbani, Ph.D. 
Chairman of the Board, 
Chief Executive Officer and Secretary 

Barry W. Weiner 
President, Chief Financial Officer, 
Principal Accounting Officer and Treasurer 

Elazar Rabbani, Ph.D. 
Chairman of the Board 
Chief Executive Officer 

Barry W. Weiner 
President and Chief Financial Officer 

Carl W. Balezentis, Ph.D. 
President 
Enzo Life Sciences, Inc. 

Kevin Krenitsky, M.D 
President 
Enzo Clinical Labs, Inc. 

Andrew R. Crescenzo, CPA 
Senior Vice President, Finance 

Herbert B. Bass 
Vice President, Finance 

David C. Goldberg 
Vice President, 
Corporate Development 

Andrew P. Whiteley 
Vice President, 
Business Development 
Chief Operating Officer, 
Enzo Life Sciences, Inc. 

Paul C. O’Brien 
Vice President, Global 
Human Resources 

Natalie Bogdanos 
General Counsel 

Enzo Biochem, Inc. 
527 Madison Ave. 
New York, NY 10022 
(212) 583-0100 

Corporate Subsidiaries 

Enzo Clinical Labs, Inc. 
60 Executive Blvd, 
Farmingdale, NY 11735 
(631) 755-5500 

Enzo Life Sciences, Inc. 
10 Executive Blvd. 
Farmingdale, NY 11735 
(631) 694-7070 

Enzo Therapeutics, Inc. 
10 Executive Blvd. 
Farmingdale, NY 11735 
(631) 755-5500 

Corporate Information 

General Counsel 
Greenberg Traurig, LLP 
200 Park Avenue 
New York, NY 10166 

Independent Auditors 
Ernst & Young LLP 
One Jericho Plaza 
Jericho, NY 11753 

Transfer Agent and Registrar 
American Stock Transfer &  
Trust Company 
59 Maiden Lane 
New York, NY 10038 

Common Stock  
Listed on NYSE 
(Symbol: ENZ) 

Market for Registrant’s Common Equity and Related Stockholder Matters 

The common stock of the Company is traded on the New York Stock Exchange: (Symbol: ENZ).  The following table sets forth the high and 
low sale price of the Company’s Common Stock for the periods indicated as reported on the New York Stock Exchange. 

2010 Fiscal Year  
(August 1, 2009 to July 31, 2010): 

High 

Low

2009 Fiscal Year  
(August 1, 2008 to July 31, 2009): 

               High 

Low

1st  Quarter 
2nd Quarter 
3rd Quarter 
4th Quarter 

  $7.66 
               $4.51 
  $6.24                  $4.52 
$4.66 
  $6.67 
$3.90
  $6.18 

1st  Quarter 
2nd Quarter 
3rd Quarter 
4th Quarter 

               $14.90                $4.44 
              $4.23 
$2.86 
$3.75 

  $6.97 
  $5.58 
  $5.64 

As of November 19, 2010, the Company had approximately 1,005 stockholders of record of its Common Stock. 

The Company has not paid a cash dividend on its Common Stock and intends to continue a policy of retaining earnings to finance and build 
its operations.  Accordingly, the Company does not anticipate the payment of cash dividends to holders of Common Stock in the foreseeable 
future. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Enzo Biochem, Inc. 
527 Madison Ave. 
New York, NY 10022 
(212) 583-0100 
www.enzo.com