David B. McWilliams

DAVID B. MCWILLIAMS has served as President and Chief Executive Officer
and as a member of the Board of Directors of Texas Biotechnology Corp.
since July 1992. Prior to joining Texas Biotechnology he served as
President, Chief Executive Officer of Zonagen, Inc., a pharmaceutical
research company involved in reproductive health, from June 1989 to July
1992, where he was also a Director. He was President and Chief Executive
Officer of Kallestad Diagnostics, a medical diagnostics manufacturing
company, from 1984-1988. Mr. McWilliams served as President of E.M.
Industries, Harleco Diagnostics Division, from 1980-1984. He has held
various executive and senior management positions with Abbott
Laboratories, McKinsey & Company and Amoco Chemicals Corporation, and
currently serves as a Director of Structural Bioinformatics, Inc. Mr.
McWilliams received a BS from Washington and Jefferson College in
Chemistry, graduating magna cum laude and Phi Beta Kappa, and received
an MBA from the University of Chicago.