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  • Title: Lateral mobility of cytochrome c on intact mitochondrial membranes as determined by fluorescence redistribution after photobleaching.
    Author: Hochman JH, Schindler M, Lee JG, Ferguson-Miller S.
    Journal: Proc Natl Acad Sci U S A; 1982 Nov; 79(22):6866-70. PubMed ID: 6294660.
    Abstract:
    Lateral mobility of an active fluorescent derivative of cytochrome c on the membranes of giant mitochondria was measured by fluorescence redistribution after photobleaching. A diffusion coefficient of 1.6 X 10(-10) cm2/sec was determined for the labeled cytochrome c on inner mitochondrial membranes under conditions where succinate oxidase activity was demonstrated. This relatively low rate of diffusion, together with results of other investigators, is explained in terms of a model involving a dynamic equilibrium between freely diffusing and associated forms of electron-transfer components.
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