1 EXHIBIT 4.2 STOCK PURCHASE AGREEMENT Amylin Pharmaceuticals, Inc. 9373 Towne Centre Drive San Diego, California 92121 The undersigned (the "Investor"), hereby confirms its agreement with you as follows: 1. This Stock Purchase Agreement (the...Stock Purchase Agreement • March 27th, 2000 • Amylin Pharmaceuticals Inc • Pharmaceutical preparations • California
