Ding, Tao; Middelberg, Anton PJ; Huber, Thomas; Falconer, Robert J.
The far-infrared spectra of lysozyme, alanine-rich peptides and small cyclic helical peptides were studied. Both lysozyme and the alanine-rich peptides had a dome in the spectral background centred on 180-220 cm-1 consistent with either structural collective modes or an ensemble of hydrogen bond vibrational modes associated with the peptide backbone. Molecular dynamics simulation of the alanine-rich peptide's infrared spectrum produced bands with similar positions to the experimental data and...[Show more]
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