3.4.24.47 668850 Horrilysin Crotalus horridus horridus 3.4.24.47 31286 Isolation and characterization of a hemorrhagic proteinase from timber rattlesnake venom Crotalus horridus horridus 3.4.24.47 31287 Substrate specificity of a hemorrhagic proteinase from timber rattlesnake venom Crotalus horridus horridus