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© Research
Publication : Journal of biomolecular NMR

Measurement of (13)C (α)- (13)CO cross-relaxation rates in (15)N-/ (13)C-labelled proteins

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of biomolecular NMR - 01 Mar 1996

Cordier F, Brutscher B, Marion D

Link to Pubmed [PMID] – 22911009

J. Biomol. NMR 1996 Mar;7(2):163-8

Internal motions play an important role in the biological function of proteins and NMR relaxation studies may characterize them over a wide range of frequencies. An experimental pulse scheme is proposed for the measurement of the (13)CO-(13)C(α) cross-relaxation rate. For sensitivity reasons, this measurement is performed in an indirect manner through several coherence transfer steps, which should thus be calibrated independently. Contributions of other relaxation pathways can be eliminated by the determination of the initial slope of the buildup curve. The cross-relaxation rates have been determined on a (15)N-/(13)C-labelled 116-residue protein and the significant variations along the sequence have been interpreted as evidence of an increased amount of fast local motion.

http://www.ncbi.nlm.nih.gov/pubmed/22911009