Possible voltage-gated potassium channel (Kv) blocker. Decreases amplitude of compound action potential and conduction velocity in toad sciatic nerve. Has only mild anticoagulant activity even at a concentration of 5ug/ml. Shows no cytotoxicity towards human cell lines. Expressed by the venom gland. Belongs to the snake three-finger toxin family. Ancestral subfamily. Orphan group II sub-subfamily.