文章基本信息

标题：Nuclear magnetic resonance description of molecular motion and phase separations of cholesterol in lecithin dispersions
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作者：S J Opella ; J P Yesinowski ; J S Waugh 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1976
卷号：73
期号：11
页码：3812-3815
DOI：10.1073/pnas.73.11.3812
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Proton-enhanced 13C nuclear magnetic resonance is used to obtain signals from labeled cholesterols in lecithin dispersions. The [26-(13)C]cholesterol resonance indicates that the aliphatic tail of the molecule undergoes reorientation fast enough to average completely the chemical shift anisotropy. In contrast, [4-(13)C]cholesterol signals are characteristic of limited anisotropic reorientation. The resonances from the 4 position are sensitive to the temperature-concentration phase diagram. A phase boundary is observed at about 20 mole percent cholesterol.