Article
Reduction and protonation of the secondary quinone acceptor of Rhodobacter sphaeroides photosynthetic reaction center: kinetic model based on a comparison of wild-type chromatophores with mutants carrying Arg-->Ile substitution at sites 207 and 217 in the L-subunit.
Biochimica et biophysica acta - 20 Jul 2000
Cherepanov D A, Bibikov S I, Bibikova M V, Bloch D A, Drachev L A, Gopta O A, Oesterhelt D, Semenov A Y, Mulkidjanian A Y
Abstract excerpt
After the light-induced charge separation in the photosynthetic reaction center (RC) of Rhodobacter sphaeroides, the electron reaches, via the tightly bound ubiquinone QA, the loosely bound ubiquinone Q(B) After two subsequent flashes of light, Q(B) is reduced to ubiquinol Q(B)H2, with a semiquinone anion Q-(B) formed as an intermediate after the first flash. We studied Q(B)H2 formation in chromatophores from Rb....
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