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The present work is a study of phonons and their dispersion in poly(α-aminoisobutyric acid) (PAIB), which is an example of a poly(amino acid) having a 3 10 helical conformation. PAIB has been used as a model to carry out conformational studies on proteins and polypeptides. Dispersion curves show two interesting opposite features: (1) a tendency of some curves to crowd or close in near...
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