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Cartoon structure of snake toxins. (A) Structure of PLA2 (PDB ID: 1PPA); (B) structure of crotamine (PDB ID 15HO); (C) structure of mambalgin 2 (PDB ID: 2MFA). Disulfide bond connectivities are shown as yellow sticks, the β-sheets are shown as arrows, and the α-helices are shown in orange. The disulfide bond connectivity shown in red for PLA2 represents the difference between class I and II.
