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Curr Opin Chem Biol. 2002 Oct;6(5):682-8.

Protein and peptide secondary structure and conformational determination with vibrational circular dichroism.

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  • 1Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 60607-7061, USA.


Vibrational circular dichroism (VCD) provides alternative views of protein and peptide conformation with advantages over electronic (UV) CD (ECD) or IR spectroscopy. VCD is sensitive to short-range order, allowing it to discriminate beta-sheet and various helices as well as disordered structure. Quantitative secondary structure analyses use protein VCD bandshapes, but are best combined with ECD and IR for balance. Much recent work has focused on empirical and theoretical VCD analyses of peptides, with detailed prediction of helix, sheet and hairpin spectra and site-specific application of isotopic substitution for structure and folding.

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