Hyperfine shift NMR studies of hydrated phospholipid inverted micelles

Shuenn Tzong Chen, Charles S. Springer

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

The 31P nuclear magnetic resonance (NMR) spectra of benzene solutions of hydrated dipalmitoyl lecithin (DPL) inverted micelles, with and without incorporated paramagnetic lanthanide ions, have been recorded. Individual resonances for micelles containing none, one, and two ions can be resolved and observed in the presence of one another. The relative intensities of these peaks yield some information on the state of aggregation of lipid inverted micelles prepared by ultrasonic irradiation. The relative intensities and chemical shifts of resonances of unsonicated mixtures of preformed micelles containing different numbers of ions per micelle indicate that some kind of equilibration occurs. The data are consistent with a selective fusion of multi-ion micelles with ion-free micelles. The NMR spectra place constraints on the lifetimes of metal ions and lipid and water molecules within a micelle before transfer to another.

Original languageEnglish (US)
Pages (from-to)23-40
Number of pages18
JournalChemistry and Physics of Lipids
Volume23
Issue number1
DOIs
StatePublished - Jan 1979
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Organic Chemistry
  • Cell Biology

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