This toxin may inhibit nicotinic acetylcholine receptor (nAChR). It has poorly reversible postsynaptic blocking activity in a chick muscle preparation and readily reversible inhibitory activity at a presynaptic site in the rat vas deferens prostatic segment most likely to prevent the release of neurotransmitters. Monomer. Expressed by the venom gland. Belongs to the snake three-finger toxin family. Ancestral subfamily. Boigatoxin sub-subfamily.