1 Exhibit 10.1 CONFIDENTIAL TREATMENT REQUESTED BY ABGENIX, INC. RESEARCH COLLABORATION AGREEMENT THIS RESEARCH COLLABORATION AGREEMENT dated as of July 15, 1998 (this "Agreement"), is entered into between ABGENIX, INC., a Delaware corporation...Research Collaboration Agreement • July 17th, 1998 • Abgenix Inc • Biological products, (no disgnostic substances) • California
