EXHIBIT 4.4 [DONLAR CORPORATION LETTERHEAD] February 25, 2002 CONFIDENTIAL Dr. Robert Gale Martin c/o Carolina Eye Associates 2170 Midland Road South Pines, NC 28387 Dear Dr. Martin: Currently, you own convertible debt of Donlar Corporation ("Donlar")...Letter Agreement • December 10th, 2002 • Donlar Corp • Biological products, (no disgnostic substances)
OFFICE LEASEOffice Lease • December 10th, 2002 • Donlar Corp • Biological products, (no disgnostic substances) • Illinois
