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  • Title: Electron spin resonance study of light-induced conformational changes in nitroxide labelled bovine rhodopsin.
    Author: Rowntree JI, Watts A.
    Journal: Biochem Biophys Res Commun; 1988 Sep 30; 155(3):1412-7. PubMed ID: 2845967.
    Abstract:
    Bovine rhodopsin was isolated in the unbleached form as a retinal disc membrane suspension and spin-labelled with 4-maleimido-2,2,6,6-tetramethylpiperidine-N-oxyl. Both conventional and saturation transfer electron spin resonance methods were used to investigate the sensitivity of the spin-label to conformational changes of rhodopsin induced by both transient and long-term exposure to light. The results indicate that the ESR methods do display sensitivity to such changes. An exponential decay curve with a time constant of 10 s was obtained by following the height of a single peak in the saturation transfer electron spin resonance spectrum in response to a single light flash.
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