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A structural schematic illustration to show the classification of conotoxins in superfamily and ion channel-target. Sixteen major conotoxin superfamilies are A, D, I1, I2, I3, J, L, M, O1, O2, O3, P, S, T, V, and Y. They are also categorized into calcium channel-targeted, sodium channel-targeted, and potassium channel-targeted conotoxins according to their functions.
