Background
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Alpha-conotoxin IMI has been isolated from the venom of the cone snail Conus mperialis. alpha-conotoxin IMI acts on postsynaptic membranes, and binds onto and inhibits nicotinic acetylcholine receptors (nAChR). This toxin blocks mammalian neuronal nAChRs (alpha3/?2 > alpha7 > alpha3/?4). It has no effect on nAChRs composed of alpha2/?2, alpha3/?2, alpha4/?2, alpha2/?4, alpha3/?4, or alpha4/?4 subunits. alpha-conotoxins IMI acts independently of voltage value. This toxin is highly active against the neuromuscular receptor in frog.
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