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  • Title: Investigation of electron transport in the chloroplasts and their fragments by the ESR method. II. Light-induced interaction of water-soluble nitroxide radical with chloroplasts and chlorophyll containing protein-lipid micelles.
    Author: Marinov BS, Akulova EA, Gribova ZP, Muzafarov EN.
    Journal: Mol Biol; 1975 Jan; 8(4):434-8. PubMed ID: 165397.
    Abstract:
    A light-induced reduction of the water-soluble nitroxide radical by chlorophyll in lipid and protein--lipid micelles was demonstrated. In contrast to model systems, in whole chloroplasts the NR is photoreduced by the electrons of the noncyclic electron transport chain. The initiation of cyclic electron transport in light particles, containing only photosystem I, does not lead to photoreduction of NR. When exogenous protein -- human serum albumin -- is added to the light particles, the nitroxide radicals are intensively reduced. The specific role of protein in electron transport from P700 to the exogenous acceptor is discussed.
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