A serine proteinase with a fibrinogenase activity was isolated from the venom of viper Echis multisquamatis. Isolation was performed by the combination of Q-sepharose and Heparine-agarose chromatography. The enzyme has apparent molecular weight 35 ± 1 kDа. It posesses strong fibrinogen β-chain, moderate αchain proteolytic activity, arginine-amidase activity as the majority of serine fibrinogena...