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Comparison of helix bending between (a) SAP in the g+ rotamer (dark green), t rotamer (yellow), and g− rotamer interacting with the carbonyl oxygen at position j-3 relative to Ser (light green); and (b) SP in the g+ rotamer (red) and g− rotamer interacting with the carbonyl oxygen at position j-4 (dark orange) and j-3 (light orange). The conformation of the t rotamer was taken as a regular Pro-kinked α-helix. The side chains of Pro and Ser/Thr are shown.
