Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. This toxin inhibits both adult and fetal (alpha-1/beta-1/epsilon/delta and alpha-1/beta-1/gamma/delta subunits) mammalian muscle nicotinic acetylcholine receptors (nAChR). In vivo, it causes paralysis and death in mice and fish. Expressed by the venom duct. The cysteine framework is C-C.