Samuel D. Colella is a managing director of Versant Ventures. From 1984 to 2000, Mr. Colella was a general partner of Institutional Venture Partners. Mr. Colella is a director of Symyx Technologies and several privately held companies.

Steven D. Goldby is the Chairman of the Board and Chief Executive Officer of Symyx Technologies. Prior to joining Symyx, Mr. Goldby served as Chief Executive Officer of MDL Information Systems, Inc. from 1987 to July 1998. Mr. Goldby joined MDL Information Systems in 1982 as Chief Operating Officer. He held numerous management positions at ALZA Corporation from 1968 to 1981, including President of ALZA Pharmaceuticals and President of Dynapol, a subsidiary of ALZA. He is a director of PeopleSoft, Inc.

Richard Lerner, M.D. is President of the Scripps Research Institute and is a director of Vysis, Inc.

Isaac Stein is one of our co-founders. Since November 1982, Mr. Stein has been president of Waverley Associates, Inc. a private investment firm. Mr. Stein is also a Managing Member of Technogen Enterprises, L.L.C. and Technogen Managers, L.L.C., which is the general partner of Technogen Associates, L.P. He is Chairman of the board of directors of Maxygen and Chairman of the Board of Trustees of Stanford University.

Alejandro Zaffaroni is one of our co-founders. He is the founder and director emeritus of ALZA Corporation. He is also a founder of DNAX, Affymax, Affymetrix, Maxygen, Symyx Technologies and several other life sciences companies.