release of fibrinopeptide b from fibrinogen by copperhead venom procoagulant enzyme results in a form of fibrin ( beta-fibrin ) with weaker self-aggregation characteristics than the normal product ( alpha beta-fibrin ) produced by release of fibrinopeptides a ( fpa ) and b ( fpb ) by thrombin .
C0016023
fibrinopeptide b
C0015982
fibrin