Restated Securities Purchase Agreement Uses in Assumption Clause

Assumption from Assignment and Assumption Agreement

This Assignment and Assumption Agreement (this "Agreement"), is dated as of September 23, 2010 and is entered into among Goldman, Sachs & Co., a New York corporation ("Assignor"), CapGen Capital Group VI LP, a Delaware limited partnership ("CapGen"), and C12 Protium Value Opportunities Ltd., a Cayman exempted company with limited liability ("C12", and together with CapGen, the "Assignees"). All capitalized terms not otherwise defined herein shal l have the meanings set forth in the Purchase Agreement (as defined below).

Assumption. Each Assignee hereby accepts, severally and not jointly, the foregoing Assignment, and assumes and agrees to perform all of the obligations of Assignor in respect of that Assignment, to become a Purchaser under the Purchase Agreement, and to perform all of its obligations thereunder, including the purchase of the number of shares of Stock allocated to such Assignee in Schedule A hereto; provided that from and after the date hereof, C12 shall have the rights, title and interests in, and obligations under, the Purchase Agreement with respect to its respective portion of the Stock as if subject to that certain Second Amended and Restated Securities Purchase Agreement, dated as of August 11, 2010, by and among the

Assumption from Assignment and Assumption Agreement

This Assignment and Assumption Agreement (this "Agreement"), is dated as of September 23, 2010 and is entered into among Goldman, Sachs & Co., a New York corporation ("Assignor"), CapGen Capital Group VI LP, a Delaware limited partnership ("CapGen"), and C12 Protium Value Opportunities Ltd., a Cayman exempted company with limited liability ("C12", and together with CapGen, the "Assignees"). All capitalized terms not otherwise defined herein shal l have the meanings set forth in the Purchase Agreement (as defined below).

Assumption. Each Assignee hereby accepts, severally and not jointly, the foregoing Assignment, and assumes and agrees to perform all of the obligations of Assignor in respect of that Assignment, to become a Purchaser under the Purchase Agreement, and to perform all of its obligations thereunder, including the purchase of the number of shares of Stock allocated to such Assignee in Schedule A hereto; provided that from and after the date hereof, C12 shall have the rights, title and interests in, and obligations under, the Purchase Agreement with respect to its respective portion of the Stock as if subject to that certain Second Amended and Restated Securities Purchase Agreement, dated as of August 11, 2010, by and among the