EXHIBIT 10.1 SUPPLY AGREEMENT This agreement ("Agreement") is made as of May 26, 1999, by and between Repligen Corporation ("REPLIGEN"), a Delaware corporation with principal offices at 117 Fourth Ave., Needham, MA 02494 and Amersham Pharmacia Biotech...Supply Agreement • August 13th, 1999 • Repligen Corp • Biological products, (no disgnostic substances) • New York
