Dennis M. Fenton, Ph.D. Independent Director since 2010 Dr. Fenton has served as a director of Xenoport, Inc., a biopharmaceutical company focused on natural drug delivery systems, since August 2009. From 1982 to 2008, Dr. Fenton held numerous positions, including executive roles in process development, manufacturing, sales and marketing, and research and development at the biotechnology company Amgen, Inc. There he served as executive vice president responsible for worldwide operations, manufacturing, process development and quality.

Prior to that role, he also held positions as senior vice president of operations and senior vice president of sales, marketing and process development for Amgen. Dr. Fenton’s qualifications to serve as director include his extensive manufacturing, operations, process development and quality control experience at Amgen. During his 25-year tenure at Amgen, he led virtually every functional area of the company. He is a highly regarded leader in manufacturing, and established much of the biologics operating protocol that is standard practice in the industry today.