Corporate Governance Committees Composition Audit Committee Compensation Committee Nominating and Corporate Governance Committee Science Committee Dr. Steven Altschuler Audit Committee Compensation Committee Kathy LaPorte Compensation Committee Nominating and Corporate Governance Committee Edward Morrow Atkinson III Nominating and Corporate Governance Committee Science Committee Derek DiRocco, Ph.D. Nominating and Corporate Governance Committee Science Committee Gregory Grunberg, M.D. Audit Committee Nominating and Corporate Governance Committee Michael Hayden, M.B. Ch.B., Ph.D. Compensation Committee Science Committee Lota Zoth Audit Committee Compensation Committee = Chairperson = Member = Chairman of the Board