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ENZO Biochem Reports Operating Results For Fiscal 2004 First Quarter

FARMINGDALE, NY, December 15, 2003 – Enzo Biochem, Inc. (NYSE:ENZ), a leading biotechnology company specializing in gene identification and genetic and immune regulation technologies for diagnostic and therapeutic applications, today reported operating results for the first fiscal quarter ended October 31, 2003.
 
For the three month period, total revenues amounted to $10.3 million, compared with $17.4 million in the corresponding year-earlier period.  Gross profit margin was 73.7%, compared with 80.5% a year ago.  The net loss for the first fiscal quarter amounted to $0.3 million, or ($0.01) per share, fully diluted, compared to net income of $3.7 million, or $0.12 per share, fully diluted, in the corresponding year-ago period.  The results reflect primarily the absence of shipments of research products by Enzo Life Sciences to a single customer that accounted for an unusually strong order flow in the year-ago first fiscal quarter. 
 
Cash flow for the quarter remained positive.  Working capital as of October 31, 2003, amounted to $97.6 million, and cash, cash equivalents and marketable securities totaled $78.6 million.
 
First fiscal quarter research and development expenses increased slightly, to $1.9 million, reflecting clinical trial activities and other research projects.   Selling, general and administrative expenses declined slightly to $3.4 million, from $3.5 million in the corresponding year-ago period, while legal expenses increased $0.2 million, to $1.0 million. 
 
Revenues at Enzo Clinical Labs in the fiscal first quarter increased 8.2%, to $7.5 million, compared with $6.9 million in the corresponding year-earlier period. Gross profit margin of 69% was comparable to the year-ago first quarter, while pre-tax income amounted to $0.7 million. Enzo Clinical Labs is benefiting from continued focus on its core office-based physician clientele.  The Clinical Labs has added personnel to its marketing staff, and is targeting additional service centers and expansion into nearby markets not now served. 
 
Enzo Life Sciences has moved forward with an aggressive marketing program designed to more directly service its end users, while simultaneously positioning the Company for upcoming product line expansion. The program involves continued increases of the direct field sales force, a comprehensive advertising campaign, increased attendance at top industry trade meetings, and publications in leading scientific journals. This effort is directed towards accelerating revenue growth in subsequent quarters, while, at the same time, bringing the Company into more direct contact with its customer base.
 
Enzo Therapeutics last month received final clearance to proceed with a
Phase I/II clinical trial of its Stealth Vector® HGTV43™ gene construct for HIV infection.  This study, to be conducted at the New York Presbyterian Hospital-Weill-Medical College of Cornell University, in New York City, is expected to begin early in calendar year 2004.  Enrollment in the Phase II randomized double blind clinical trial of Enzo’s study drug for the management of Crohn’s Disease has been completed. Preparations for a Phase II double-blind clinical trial for EHT899, the Company’s medicine for hepatitis B virus-associated chronic hepatitis, are proceeding.   In addition, an application has been filed to initiate a new clinical trial for the treatment of hepatitis C virus infection utilizing the Company’s novel small molecule immune modulation platform.
 
“Enzo Biochem continues to make significant progress,” said Barry Weiner, President.  “Our program for expanding Life Sciences’ direct sales efforts is a very positive step for the Company as we move towards a more centralized marketing approach for our proprietary products.   Enzo Clinical Labs is strongly positioned to continue its growth, and the Company’s therapeutic pipeline is growing and offers important new potential treatments for a variety of medical conditions. Enzo Biochem, Inc. enjoys a strong financial position and continues to be cash positive.  We remain excited and confident regarding the outlook.”  
 
About Enzo
Enzo Biochem is engaged in the research, development and manufacture of innovative health care products based on molecular biology and genetic engineering techniques, and in providing diagnostic services to the medical community.  The Company's proprietary labeling and detection products for gene sequencing and genetic analysis, with approximately 200 patents worldwide, are sold to the life sciences market throughout the world.  The Company's therapeutic division is in various stages of clinical evaluation of its proprietary gene medicine for HIV-1 infection and its proprietary immune regulation medicines for hepatitis B and hepatitis C infection and for Crohn’s Disease.  The Company also holds a patent covering a method and materials for correcting point mutations or small insertions or deletions of genetic material that would allow for editing and correcting certain abnormalities in genes.  For more information visit our website www.enzo.com.  
 
Except for historical information, the matters discussed in this news release may be considered ”forward‑looking" statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended.  Such statements include declarations regarding the intent, belief or current expectations of the Company and its management. Investors are cautioned that any such forward‑looking statements are not guarantees of future performance and involve a number of risks and uncertainties that could materially affect actual results.  The Company disclaims any obligations to update any forward-looking statement as a result of developments occurring after the date of this press release.
 
A conference call conducted by Enzo Biochem, Inc. management will take place on Tuesday, December 16, 2003 at 8:30 A.M. (ET).  It can be accessed by dialing 888-338-6461, International callers can dial 973-935-8509.  You may also listen over the Internet at www.vcall.com. To listen to the live call on the Internet, please go to the web site at least fifteen minutes early to register, download and install any necessary audio software.  For those who cannot listen to the live broadcast, a replay will be available through midnight December 28, 2003, shortly following the live call. For replay, dial 877-519-4471 (973-341-3080 internationally).  You will be prompted for PIN number 4368231.