Lexicon Pharmaceuticals Inc.

Mr. Debbane has been the Chairman of our Board of Directors since our acquisition by Artal on September 29, 1999. Mr. Debbane is a co-founder and President of The Invus Group, LLC. Prior to forming The Invus Group, LLC in 1985, Mr. Debbane was a manager and consultant for The Boston Consulting Group in Paris, France. He holds an M.B.A. from Stanford Graduate School of Business, an M.S. in Food Science and Technology from the University of California, Davis and a B.S. in Agricultural Sciences and Agricultural Engineering from American University of Beirut. Mr. Debbane is a director of Artal Group S.A., and Ceres, Inc. and the Chairman of the Board of Directors of GoldenSource Corporation.

Philippe J. Amouyal. Mr. Amouyal has been a director since November 2002. Mr. Amouyal is a Managing Director of The Invus Group, LLC, a position he has held since 1999. Previously, Mr. Amouyal was a Vice President and director of The Boston Consulting Group, Inc. in Boston, MA. He holds an M.S. in engineering and a DEA in Management from Ecole Centrale de Paris and was a Research Fellow at the Center for Policy Alternatives of the Massachusetts Institute of Technology. Mr. Amouyal is a director of GoldenSource Corporation and Blue Buffalo Company Ltd.

Dr. Zambrowicz has been executive vice president and chief scientific officer since February 2007. Dr. Zambrowicz served as executive vice president of research from August 2002 to February 2007, senior vice president of genomics from February 2000 to August 2002, vice president of research from January 1998 to February 2000, and senior scientist from April 1996 to January 1998. Dr. Zambrowicz has been instrumental in setting the overall scientific direction of the company, including the development of Lexicon's proprietary gene knockout technology and small molecule drug discovery. Under his direction, Lexicon has knocked out and analyzed nearly 5,000 genes resulting in more than 100 potential drug targets and produced the world's largest collection of mouse embryonic stem cells for use in drug discovery. He has authored numerous scientific and drug development publications focusing on gene knockout technology and drug discovery. Prior to joining Lexicon, Dr. Zambrowicz served as a National Institutes of Health postdoctoral fellow at the Fred Hutchinson Cancer Center in Seattle, Washington, where he studied gene trapping and gene targeting technology. He received his B.S. in biochemistry from the University of Wisconsin. He received his Ph.D. in biochemistry from the University of Washington, where he studied tissue-specific gene regulation using transgenic mice.

Dr. Main has been executive vice president of pharmaceutical research since February 2007 and served as senior vice president from July 2001 to February 2007. Dr. Main established the Medicinal Chemistry operations based in Princeton, New Jersey which are responsible for the design, synthesis, and preclinical testing of all of Lexicon’s small molecule drug candidates that may enter human clinical trials. In addition, Dr. Main has played a key role the design and implementation of the company's scientific strategy and prioritization of Lexicon's small molecule drug discovery portfolio. Prior to joining Lexicon, Dr. Main was president and chief executive officer of Coelacanth Corporation, a leader in using proprietary chemistry technologies to rapidly discover new chemical entities for drug development. Lexicon acquired Coelacanth Corporation in July 2001 to bring together the powerful biology and chemistry technologies necessary to create a revolutionary new pharmaceutical company. Prior to Coelacanth, Dr. Main spent more than 20 years in the discovery and development of novel drugs at Novartis Pharmaceuticals Corporation where he was formerly senior vice president, U.S. Research. Dr. Main holds a B.S. from the University of Aberdeen, Scotland, a Ph.D. in organic chemistry from the University of Liverpool, England and completed postdoctoral studies with the Nobel Laureate Prof. R.B. Woodward, at the Woodward Research Institute in Basel, Switzerland.

Dr. Ishimoto has been senior vice president of intellectual property since February 2004. Dr. Ishimoto served as our vice president of intellectual property from July 1998 to February 2004. Dr. Ishimoto has been responsible for filing over 190 issued U.S. and foreign patents and more than 400 pending U.S. and foreign patent applications for Lexicon. Prior to joining Lexicon, he was a biotechnology patent attorney at the Palo Alto, California office of the law firm of Pennie & Edmonds LLP. Dr. Ishimoto received his B.A. and Ph.D. from the University of California at Los Angeles, where he studied molecular mechanisms of virus assembly and the regulation of virus ultrastructure. After receiving his Ph.D., he served as a National Institutes of Health postdoctoral fellow at the University of Washington School of Medicine. He received his J.D. from Stanford University.

Dr. Brown has been senior vice president of clinical development since February 2008, having served as vice president of clinical development since April 2003. Before joining Lexicon, Dr. Brown was vice president of clinical development for Encysive Pharmaceuticals Inc. (formerly Texas Biotechnology Corporation), where he was responsible for compound development activities, including gaining marketing approval of Argatroban, a direct thrombin inhibitor for use in heparin-induced thrombocytopenia. Prior to his work at Encysive, Dr. Brown held a variety of management positions within contract research organizations. He has managed drug programs from initial regulatory filings through product approval and commercialization and has over 18 years of experience managing medical affairs, drug safety, and clinical programs in multiple therapeutic areas. Over the course of his career, Dr. Brown has conducted over 200 clinical trials as an investigator. Dr. Brown is a fellow of the American College of Legal Medicine and serves as an adjunct faculty member at the Massachusetts General Hospital, Institute of Health Professions in Boston. He received his M.D. from Texas Tech University School of Medicine, his J.D. from the University of Texas School of Law, and his B.A. from Hendrix College.

Alan S. Nies, M.D. has been a director since November 2003 and chairman of our medical advisory board since March 2003. Dr. Nies has more than 40 years of clinical and pharmacological experience and plays an integral advisory roll in the development of Lexicon’s clinical programs. From 1992 through September 2002, Dr. Nies served in a series of senior management positions at Merck & Co. Inc., most recently as senior vice president of clinical sciences from 1999 to 2002. During his tenure at Merck, Dr. Nies was responsible for worldwide clinical development and clinical research. Dr. Nies was involved in the development of several drugs including Fosamax, Singulair, Emend, Zetia and Vioxx. Following his retirement from Merck, Dr. Nies has been consulting on drug development issues for several companies. Prior to joining Merck, Dr. Nies spent 15 years as professor of Medicine and Pharmacology, and head of the Division of Clinical Pharmacology at the University of Colorado Health Sciences Center. Dr. Nies also spent seven years at Vanderbilt University in the Clinical Pharmacology unit. During his career, Dr. Nies has participated in many national and international committees and organizations and has received a number of honors including the Harry Gold award and the Oscar B. Hunter award. Dr. Nies received a PhRMA Foundation Faculty Award in Clinical Pharmacology in 1971 and the 2005 Award in Excellence of Clinical Pharmacology. Dr. Nies received his B.S. in Chemistry from Stanford University and his M.D. from Harvard Medical School. He completed his Internal Medicine residency at the University of Washington and a Clinical Pharmacology fellowship at the University of California in San Francisco. In 1968 he went into the U.S. Army where he was Chief of the section on Clinical Pharmacology at Walter Reed Army Institute of Research. Here he worked on the development of antimalarial drugs for drug-resistant malaria that was endemic in Vietnam. The drug mefloquin came out of this program.

Frank P. Palantoni has been a director since November 2004. Mr. Palantoni served as chief executive officer of Prestige Brands Holding, Inc. from April to June 2006 and as a director from January to June 2006. From 1998 to 2004, Mr. Palantoni held a variety of senior management positions with Novartis AG, most recently as president and chief executive officer, worldwide of its Gerber Products Company, Novartis Infant and Baby Division. Mr. Palantoni also served as president and chief executive officer for North American operations of Novartis Consumer Health Division from 2000 to 2001. Prior to joining Novartis, he held a series of senior management positions with The Danone Group. Mr. Palantoni received his B.S. from Tufts University and his M.B.A. from Columbia University.

Kathleen M. Wiltsey has been a director since February 2007. From 1984 through 1998, Ms. Wiltsey served in a series of senior marketing and business development positions at Amgen Inc., including as co-product development team leader and marketing director for EPOGEN® and as vice president with responsibility for Amgen's product licensing function. From May to October 2006, Ms. Wiltsey served the X Prize Foundation as executive director for the development and launch of the Archon X PRIZE for Genomics, a global technology competition to dramatically reduce the cost of sequencing human genomes and accelerate personalized medicine. Ms. Wiltsey has served in a variety of business and corporate development advisory roles for numerous biotechnology companies and is currently a director of Sequenom, Inc. and president of the board of The Associates of the California Institute of Technology. She received her B.S. from the Colorado School of Mines and her M.B.A. from Harvard University.