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Solid-state 13C NMR spectroscopy was used to investigate the three-dimensional structure of melittin as lyophilized powder and in ditetradecylphosphatidylcholine (DTPC) membranes. The distance between specifically labeled carbons in analogs [1-13C]Gly3-[2-13C]Ala4, [1-13C]Gly3-[2-13C]Leu6, [1-13C]Leu13-[2-13C]Ala15, [2-13C]Leu13-[1-13C]Ala15, and [1-13C]Leu13-[2-13C]Leu16 was measured by rotational...
Water diffusion in the lamellar phase of egg phosphatidylcholine (egg PC)-water was studied by 1H NMR using the pulsed field gradient-spin echo method. The curvature of diffusion plots obtained with egg PC-water mixtures indicates that water diffusion is highly anisotropic with respect to lipid lamellae. This was confirmed by measurements made on macroscopically aligned egg PC-water as a function...
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