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J Magn Reson. 2003 Aug;163(2):288-99.

Dipolar Waves as NMR maps of helices in proteins.

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  • 1Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA.


Dipolar Waves describe the periodic variation in the magnitudes of dipolar couplings in the backbone of a protein as a function of residue number. They provide a direct link between experimental measurements of dipolar couplings in aligned samples and the periodicity inherent in regular secondary structure elements. It is possible to identify the residues in a helix and the type of helix, deviations from ideality, and to orient the helices relative to an external axis in completely aligned samples and relative to each other in a common frame in weakly aligned samples with Dipolar Waves. They provide a tool for accurately describing helices and a step towards high throughput structure determination of proteins.

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