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.