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Donald G. Payan M.D. one of Rigel's co-founders has been a member of our Board of Directors since July 1996 and has served as our Executive Vice President and Chief Scientific Officer since January 1997. From January 1997 to July 1998 he also served as our Chief Operating Officer. From July 1996 to January 1997 Dr. Payan served as our President and Chief Executive Officer. From December 1995 to May 1996 Dr. Payan was Vice President of AxyS Pharmaceuticals Inc. a biopharmaceutical company. From September 1993 to December 1995 Dr. Payan was Executive Vice President and Chief Scientific Officer of Khepri Pharmaceuticals Inc. which he founded and subsequently merged with AxyS Pharmaceuticals. Dr. Payan continues his association with the University of California San Francisco which began in 1982 where he is currently an Adjunct Professor of Medicine and Surgery. Dr. Payan holds a B.S. and an M.D. from Stanford University. | 