Tj. Norwood et al., Influence of cross-correlation between the chemical shift anisotropies of pairs of nuclei on multiple-quantum relaxation rates in macromolecules, CHEM P LETT, 300(3-4), 1999, pp. 429-434
The relaxation of multiple-quantum coherence due to intramolecular dipole-d
ipole and chemical shift anisotropy (CSA) relaxation mechanisms is describe
d. It is shown that cross-correlation between the CSAs of the active spins
can affect the relaxation of H-1-N-15 two-spin coherences in the protein ba
ckbone. An experiment that enables this effect to be monitored is discussed
. Data are presented for perdeuterated N-15-labelled human dynamic light ch
ain 1 protein (hdlc1). An analysis of the results yields a value for the CS
A of the active H-1. (C) 1999 Elsevier Science B.V. All rights reserved.