CroFab by Wells Brambl on August 30, 2019 What are the common and scientific names of the 4 species used to produces CroFab? What structure does Fab have? Mohave Rattlesnake (Crotalus scutulatus) Diambondback Rattlesnake (Crotalus atrox) Eastern Diamonback Rattlesnake (Crotalus adamanteus) Cottonmouth/Water moccasin (Agkistrodon piscivorus) Ovine papain digested Ab results in cleavage at the hinge site resulting in 2 linear Fab’s per antibody. This is comparison to pepsin cleavage resulting in a v-shaped Fab.