“…This comprises also a specialized venom gland producing a complex mixture of toxic and enzymatically active proteins, which is perfectly suited to subdue, kill, and help digest prey, and which is also used for defense. These snake venom components had been recruited from multiple protein families like phospholipases A 2 and proteases or had been modified from existing salivary proteins (Fry 2005;Fujimi et al 2002;Kochva 1987, Kochva et al 1983. They became toxic proteins like neurotoxins, cytotoxins, inhibitors, hemorrhagins, or clotting enzymes and may have coevolved with a refined venom-delivery system, particularly with the development of the injection device, the fangs.…”