Figure 1.

The three isomers of αΟ-conotoxin GeXIVA and the 3D NMR solution structure of ribbon GeXIVA (18). Cys residues are labeled with Roman numerals (I–IV), and the disulfide bonds are shown as yellow sticks. The structure shown for the ribbon GeXIVA is the lowest energy conformer from an ensemble of 10 NMR models.