Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. This peptide blocks mammalian nicotinic acetylcholine receptors composed of alpha-3-beta-2/CHRNA3-CHRNB2 and alpha-3-beta-4/CHRNA3-CHRNB4 subunits. Expressed by the venom duct. The cysteine framework is I (CC-C-C). Alpha4/7 pattern. Without sulfation. With sulfation. Belongs to the conotoxin A superfamily.