Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them (By similarity). This toxin inhibits high voltage-activated (HVA) calcium channel currents in rat DRG neurons (13% inhibition at 1 uM toxin) probably by activating GABA(B) receptors (GABBR1 and/or GABBR2) (PubMed:26948522). Expressed by the venom duct. The cysteine framework is I (CC-C-C). Alpha4/4 pattern. Belongs to the conotoxin A superfamily.