Detailed view of the hydrogen bond pattern, in the Pro-kink turn, of model peptides containing Pro and the (S/T)P, (S/T)AP, and (S/T)AAP patterns, with Ser and Thr side chains built in both g+ and g− conformations. Only polar hydrogens are depicted to offer a better view. The OγH group of Ser/Thr is interacting with the carbonyl oxygen at position j-4, relative to Ser/Thr, except when noted. Figures were created using MolScript v2.1.1 (Kraulis, 1991) and Raster3D v2.5 (Merritt and Bacon, 1997).