| Independent Directors | Financial Expert | Audit Committee | Compensation Committee | Corporate Governance Committee |
| Francis J. Bullock, Ph.D. |  |  | Member | Member |
| Marvin H. Caruthers, Ph.D. | |  | Member |  |
Kyle A. Lefkoff Board Chair |
Yes |
Member | Chairperson | Member |
| Gil J. Van Lunsen | Yes | Chairperson | |  |
| Douglas E. Williams, Ph.D |  |  | Member |  |
| John L. Zabriskie, Ph.D. | Yes | Member |  | Chairperson |