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Fast dynamics and kinky turns: The designed peptide PG12 forms a β-hairpin stabilized by a D-Pro enhanced type-II′ β turn. Through a combination of 13C′ isotope labels and temperature-jump nonlinear infrared spectroscopy local folding events were observed on a submicrosecond timescale, in which the turn region remains structured during the temperature jump, and midstrand region opens up on a 130-ns timescale.
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Smith et al. (2007) studied this question.
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