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VCD versus ECD spectroscopy. Peptides rich in aromatic residues yield anomalous far-UV electronic circular dichroism (ECD) spectra that preclude secondary structure assignment. The utility of vibrational circular dichroism (VCD) in conformation analysis is demonstrated by using a set of well-defined peptide helices and hairpins containing proximal aromatic residues.
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Mahalakshmi et al. (2005) studied this question.
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