Figure 7. Structural representations of linear χ-MrIA (top) and cyclic χ-MrIA (bottom).² .

Both the peptides have very similar structures. The β-sheets are in blue, the loop and turn regions are in purple. The residues used to link N and C-termini of χ-MrIA are labeled and highlighted in orange. The disulfide bonds in green are shown in a ball-and-stick representation. The structures were visualized using PyMol.¹