Snake venom proteins are potential sources for novel drug design both for treatment of snake bites and human haemostatic disorders. To achieve these, the basic sequence, structure and functional relationships of venom proteins should be fully understood. Proteolytic enzymes such as metallo and serine proteases are the major components of viper venoms and responsible for severe envenomation effects. In this work, a serine protease and a metalloprotease from the venom of Bitis gabonica rhinoceros were purified, sequenced and functionally characterised. Nine further serine protease sequences...