ORIENTATION OF LIPID SPIN LABELS IN LECITHIN MULTILAYERS
Author(s) -
Louis J. Libertini,
Alan S. Waggoner,
Patricia C. Jost,
O. Hayes Griffith
Publication year - 1969
Publication title -
proceedings of the national academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.64.1.13
Subject(s) - lecithin , anisotropy , perpendicular , stearic acid , orientation (vector space) , phospholipid , cholestane , spin label , membrane , chemistry , crystallography , materials science , nuclear magnetic resonance , physics , biochemistry , organic chemistry , optics , geometry , mathematics
Nitroxide-labeled stearic acid and cholestane have been incorporated into lecithin multilayers. The pronounced anisotropy of the preparations reflects a nonrandom structure of the lecithin film and demonstrates that these lipid probes can report structural information from lipid regions resembling those thought to occur in membranes. These two probes differ with respect to the orientation of the NO bond to the long axis, but both orient with their long axes perpendicular to the phospholipid film. Simulated spectra, calculated on the basis of a Gaussian distribution of orientations, are in agreement with the experimental results.
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