the rational nomenclature of kaliseptine is kappa-actitoxin-avd6a. the first letter kappa indicates its molecular target, namely a voltage-gated potassium channel. actitoxin is a neurotoxin derived from the actiniidae. avd denotes that it is extracted from "anemonia viridis". finally, 6a specifies that this was the sixth acititoxin of which the full-length amino acid sequence was published and that this is the first isoform.