Binds to muscle nicotinic acetylcholine receptor (nAChR) and inhibit acetylcholine from binding to the receptor, thereby impairing neuromuscular transmission (By similarity). The recombinant protein also barely blocks voltage-gated potassium channel Kv1.3/KCNA3 (2.71% inhibition at 60 nM of toxin) (PubMed:30648553). Expressed by the venom gland. LD(50) is 0.09 mg/kg by intramuscular injection into mice. Belongs to the snake three-finger toxin family. Short-chain subfamily. Type I alpha-neurotoxin sub-subfamily.