EXHIBIT 10.286 [Ligand Letterhead] July 28, 2005 Mr. Taylor J. Crouch Senior Vice President, Regulatory Affairs and Compliance LIGAND PHARMACEUTICALS INCORPORATED 10275 Science Center Drive San Diego, CA 92121 Dear Taylor: The purpose of this letter...Severance Agreement • December 9th, 2005 • Ligand Pharmaceuticals Inc • Pharmaceutical preparations
