Figure 1
Two-dimensional histograms of the χ1 and χ2 dihedral angles of isoleucine in structures with resolution ranges of (a) 0.0–2.0 Å and (b) 3.0–10.0 Å. The data are scaled logarithmically from black (minimum) to white (maximum) and are divided into nine sections of 120 × 120°. The bin size is 1°. A total of 558 287 isoleucines contributed to the high-resolution plot (a) and 90 891 contributed to the low-resolution plot (b). (c) The nine rotamers of isoleucine with χ values of 60.0° (gauche+ or g+), 180.0° (trans or t) or 300.0° (gauche− or g−). |