In venom, its toxic role is unclear: it could result in less musculatory control by rapidly hydrolyzing acetylcholine, or that it works synergistically with alkaline phosphatase (ALP) in paralyzing prey through hypotension. In muscle, it terminates signal transduction at the neuromuscular junction by rapid hydrolysis of the acetylcholine released into the synaptic cleft. In liver, its function is unclear: it could serve as a safeguard against any diffusion of acetylcholine from synapses into the circulation. acetylcholine + H2O = acetate + choline + H(+) Expressed by the venom gland. Is also probably expressed by liver and muscle. The N-terminus is blocked. Belongs to the type-B carboxylesterase/lipase family.