title: Vibrational analysis of peptides, polypeptides, and proteins. XVII. Normal modes of crystalline Pro-Leu-Gly-NH2, a type II beta-turn.
abstract: A normal mode calculation has been done for Pro-Leu-Gly-NH2 in its crystalline type II beta-turn structure, and assignments have been made to infrared and Raman bands of this molecule and its N-deuterated derivative. Observed and calculated frequencies below 1700 cm-1 agree to within about 6 cm-1. This analysis provides a sound basis for studying the conformation dependence of the vibrational spectrum.
mesh_terms: D009075:MSH Release-Inhibiting Hormone; D008958:Models, Molecular; D010455:Peptides; D011487:Protein Conformation; D011506:Proteins; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014732:Vibration
chemical_list: D010455:Peptides; D011506:Proteins; D009075:MSH Release-Inhibiting Hormone