ESR spectra and scanning electron micrographs of human erythrocytes spin labeled with the conventional stearic acid nitroxide substituted at the 5-position have been obtained over a range of label-to-lipid ratios. While morphological changes as previously reported (Bieri V.G.; Wallach D.F.H.; Lin P.S. (1974) Proc. Natl. Acad. Sci. U. S. 71, 4797-4801) are reproduced, it is shown that at label-to-lipid ratios of 1 : 10 or less the basic ESR spectrum is not significantly affected. At low label concentrations the spin labeling technique is a viable one and can be used to investigate membrane properties.
|Number of pages||6|
|Journal||BBA - Biomembranes|
|State||Published - Apr 5 1976|
ASJC Scopus subject areas
- Cell Biology