[Presence of an active fibrinogen--heparin complex in the total blood plasma fraction of plasma fibrinogen degradation products].

It is found by means of different methods (the administration of 35S-heparin, the determination of fibrinolytic activity of blood plasma fractions containing fibrinogen degradation products and fibrinogen--heparin complex, spectral analysis of fibrinogen--heparin complex etc.), that thrombin injection into animals results in the formation of fibrinogen--heparin complex, which is mainly discovered in the fraction of fibrinogen degradation products.