An overview of the diversity and evolution of snake fangs Snake Venoms UMich Orientation of Proteins in Membranes families/superfamily-55 - Calculated orientations of snake venome toxins in the lipid bilayer UMich Orientation of Proteins in Membranes families/superfamily-90 - Calculated orientations of snake venom phospholipases A2 and myotoxins in the lipid bilayer LD50's for most toxic venoms.