SEATTLE--(BUSINESS WIRE)--ZymoGenetics, Inc. (NASDAQ: ZGEN) presented positive results today from a Phase 3b clinical trial with RECOTHROM® Thrombin, topical (Recombinant). The study provided additional information about the immunologic safety of RECOTHROM and demonstrated that RECOTHROM was well tolerated when applied as an aid to hemostasis in patients, including those with pre-existing antibodies to bovine thrombin.