Figure 1.

Pro-Leu-Gly-NH2 (1, PLG) in a type-II β-turn conformation (grey) overlaid with Pro-Leu-Pro-NH2 (3) in a type-VI β-turn conformation.

Pro-Leu-Gly-NH2 (1, PLG) in a type-II β-turn conformation (grey) overlaid with Pro-Leu-Pro-NH2 (3) in a type-VI β-turn conformation.