Transverse relaxation in supported and nonsupported phospholipid model membranes and the influence of ultraslow motions: A31P‐NMR study

Autor:	Alfred Möps, Thomas M. Bayerl, Christoph Dolainsky
Rok vydání:	1993
Předmět:	Physics::Biological Physics Vesicle Relaxation (NMR) Synthetic membrane General Physics and Astronomy Molecular physics Spectral line chemistry.chemical_compound Nuclear magnetic resonance Membrane chemistry Phosphorus-31 NMR spectroscopy Physical and Theoretical Chemistry Anisotropy POPC
Zdroj:	The Journal of Chemical Physics. 98:1712-1720
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.464286
Popis:	The effect of motions which are slow on the NMR time scale (in particular, lateral diffusion) on the 31P‐NMR transverse relaxation behavior of POPC (1‐palmitoyl‐2‐oleoyl‐sn‐glycero‐3‐phosphocholine) phospholipid membranes was studied by experiment and computer simulation. Two new membrane model systems (spherical supported vesicles) which exhibit some unique geometrical features and physical properties as well as the commonly used multilamellar vesicles, were applied for the measurement of the 31P‐NMR anisotropic transverse relaxation times. The known geometry of the new membrane model systems under study enables a direct comparison of the experimental transverse relaxation spectra with those obtained by a spectral simulation technique which considers random diffusion on the surface of a sphere as the dominant relaxation mechanism, where the sphere size corresponds to that used in the experiments. The transverse relaxation times obtained experimentally for the three model systems studied differ drasticall...
Databáze:	OpenAIRE
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