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Conformational aspects of polypeptide structure. XXXIII. Infrared spectra and molecular conformations of γ‐ethyl L‐glutamate oligopeptides

Infrared spectra of homo‐ and co‐oligopeptides containing glutamate residues were studied in both solution and solid state. Conformational analyses of these oligomers were carried out by using amide I and II band frequencies. Trimethyl phosphate supports the folded structure of oligomers above the heptamer. In chloroform solution, these oligomers assume the β‐extended structures above the pentamer.