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In page Cobatoxin:

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Cobatoxin is a 32-residue toxin with 3 disulfide bridges, which are located on C1-C4, C2-C5 and C3- C6 (Cys3-Cys22, Cys8-Cys27, and Cys12-Cys29). The peptide backbone is folded according to an α/β scaffold, both α-helical and two-stranded β-sheet structures are present. Cobatoxin 1 has a rod-like shape due to an extended N-terminus.[1][2]