Lethal toxin which possesses an inhibitory effect on direct electrical stimulation of the isolated hemi-diaphragm. Neither hemorrhagic nor hemolytic activities are detected. Phospholipase A2 activity, proteolytic activity and arginine esterolytic activity are absent. Expressed by the venom gland. LD(50) is 0.135 mg/kg on mice. Belongs to the beta-defensin family. Helofensin subfamily.