Subsequent Events

6 Months Ended

Jun. 30, 2011

Subsequent Events

Subsequent Events

11.  Subsequent Events

On August 2, 2011, the Company and GSK entered into an agreement pursuant to which GSK agreed to purchase through an affiliate, in a private placement, 102,466 shares of the Company’s common stock for $19.71 per share pursuant to its rights under the Company’s governance agreement with GSK dated June 4, 2004, as amended.

On July 21, 2011, GlaxoSmithKline LLC, an affiliate of GSK, converted 6,820,854 shares of the Company’s Class A common stock into the Company’s common stock, and on July 22, 2011, Glaxo Group Limited, an affiliate of GSK, converted 2,580,645 shares of the Company’s Class A common stock into the Company’s common stock, in each case on a one share-for-one share basis in accordance with the terms of the Company’s restated certificate of incorporation. Following these conversions there are no shares of the Company’s Class A common stock outstanding.