Exhibit 13 Warrant Agreement Dated as of March 27, 2002 WARRANT AGREEMENT, dated as of March 27, 2002, between BioTime, Inc., a California corporation (the "Company"), and Alfred D. Kingsley (the "Lender"). The Company proposes to issue a Common Share...Warrant Agreement • April 2nd, 2002 • Greenway Partners L P • Biological products, (no disgnostic substances) • California
Exhibit 12 REVOLVING LINE OF CREDIT AGREEMENTRevolving Line of Credit Agreement • April 2nd, 2002 • Greenway Partners L P • Biological products, (no disgnostic substances) • California
