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Experimental and simulated absolute 2D IR rephasing (top) and nonrephasing (bottom) spectra of a 310-helical hexapeptide Z-Aib-L-Leu-(Aib)2-Gly-OtBu in the amide II frequency region. Each spectrum is normalized by the peak intensity of the diagonal amide II band.217 Reproduced from Figure 10 of Ref.217. Copyright 2010 The American Chemical Society.
