[The use of Soviet substitutes for batroxobin in the determination of fibrinogen]

Plasma fibrinogen was measured by kinetic photometry with two Soviet analogs of the foreign agent batroxobin: ancistron-N and agichal, obtained from Central Asian Aspidelaps lubricus venom by different techniques. Both the preparations of thrombin-like enzyme from the venom have proved to be adequate substituents of batroxobin; the optimal concentration of ancistron-N for this test was found to be 20 micrograms/ml or 0.04 U/ml, that of agichal 0.5 micrograms/ml.