Dr. Tucker has served as our Chief Scientific Officer since February 2010 and as a member of our board of directors since March 2004. From March 2004 to February 2010, Dr. Tucker served as our Vice President of Research and Director of Immunology. Prior to this, Dr. Tucker held numerous scientific and engineering roles at various biotechnology companies. Dr. Tucker received a B.S. in chemical engineering from the University of Washington, an M.S. in chemical engineering from the University of California, Berkeley, and a Ph.D. in immunology from the University of Washington.