Spin-Label Study of the Iodine-Lecithin Interaction
โ Scribed by JENDRASIAK, GORDON L.; HAYES, ROBERT
- Book ID
- 109670772
- Publisher
- Nature Publishing Group
- Year
- 1970
- Tongue
- English
- Weight
- 327 KB
- Volume
- 225
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/225278a0
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๐ SIMILAR VOLUMES
Paramagnetic resonance of cholestane and three fatty acid probes is used to measure the effects of the addition of cholesterol, 7-dehydrocholesterol and ergosterol to egg phosphatidylcholine bilayers. At low concentrations we find that all three sterols effectively align the bilayers. However, conce
At very low concentration (10-100 FM), phosphatidylcholine (egg lecithin) forms a 1: 1 molecular complex with iodine in cyclohexane solvent. The thermodynamic and spectrophotometric properties of this complex have been determined. The thermodynamic values are: K,(24"C) = 7.35 x lo3 1 mol-i, AGo = -2
The motion of the cholestane spin label in oriented lecithin-cholesterol multibilayers is described in terms of a rotational diffusion about the long molecular axis with diffusion coefficient D parrell and a restricted random librational motion about axes perpendicular to the long axis with diffusio
In egg lecithin-water lamellar phases, spin-labeled stearic acid gives two superimposed ESR spectra which are only well resolved when the temperature is greater than 30 degrees C. These two spectral components are attributed to the dissociated and non-dissociated forms of the fatty acid carboxylic g