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Orientation dependence of NMR relaxation time, T(1rho), in lipid bilayers
F Separovic1, B Cornell, R Pace
1School of Chemistry, University of Melbourne, Vic. 3010, Australia. f.separovic@chemistry.unimelb.edu.au
Chemistry and Physics of Lipids
|November 25, 2000
Abstract:
The orientation dependence of the low frequency NMR relaxation time, T(1rho), of protons in aligned phospholipid bilayers was measured using 13C cross polarisation and direct proton experiments. The contribution of intra- and inter-molecular interactions to proton T(1rho) was determined by using dimyristoyl phosphatidylcholine (DMPC) with one hydrocarbon chain deuterated and dispersed in perdeuterated DMPC. The results indicated that intramolecular motions on the kHz timescale were the major cause of T(1rho) relaxation in phospholipid bilayers.