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Infrared spectra and resonance interaction of amide‐I vibration of the antiparallel‐chain pleated sheet
Author(s) -
Chirgadze Yu. N.,
Nevskaya N. A.
Publication year - 1976
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1976.360150402
Subject(s) - antiparallel (mathematics) , chemistry , beta sheet , resonance (particle physics) , spectral line , dipole , infrared , infrared spectroscopy , raman spectroscopy , vibration , amide , molecular physics , crystallography , nuclear magnetic resonance , peptide , atomic physics , physics , organic chemistry , optics , quantum mechanics , magnetic field , biochemistry
Theoretical treatment of resonance interaction of amide‐I vibration has been done in a dipole–dipole approximation on the basis of perturbation theory. A single infinite antiparallel‐chain pleated sheet as well as different kinds of its finite fragments have been considered. A good agreement has been obtained between calculated spectral parameters of amide I of the infinite sheet and observed ones in infrared and Raman spectra of synthetic polypeptides and fibrous proteins. A theoretical dependence of the resonance frequency shift of the main component and frequency splitting of two components active in the infrared spectra on the number of polypeptide chains in the finite sheet has been found.