Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them (By similarity). Has a distinct nAChR binding mode from other alpha-conotoxins, due to a different three residue motif (Ala-Xaa-Ala instead of the conserved Ser-Xaa-Pro motif) (By similarity). Expressed by the venom duct. The cysteine framework is I (CC-C-C). Alpha4/7 pattern. Belongs to the conotoxin A superfamily. Conotoxins Lt1.1 and Lt1.2 are the same protein. They possess a different name due to their different precursors.