He side-chains of the type II/II -turns are significantly less directional and appear in all of the clusters. Of the 23 examined, about 35 have anti 1(i) values, and 61 have gauche values of 1(i+3) (Table S4.38). This suggests that gauche/anti differential is less energetically significant at both the i and i+3 positions among the type II/II -turns.ArticleH-Bond Geometries. The ability to form i