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. 2004 Jan;86(1):105–115. doi: 10.1016/S0006-3495(04)74088-6

FIGURE 4.

FIGURE 4

Comparison of helix bending between a Pro-containing polyAla α-helix (control, yellow) and (a) SP (red) and SAP (dark green) in the g+ rotamer, and TAP (light green) and PAAS (purple) in the g− rotamer transmembrane α-helices (the OγH group of S/T is interacting with the carbonyl oxygen at position j-4, relative to S/T, in all the cases); and (b, c) SP (orange) and SAP (light green) in the g− rotamer interacting with the carbonyl oxygen at position j-3 relative to Ser (different views rotated by 90° along the helical axis). The side chains of Pro and Ser/Thr are shown.