Open AccessPhotoreactions of Cytochrome b 563 and f 554 in Intact Spinach Chloroplasts: Regulation of Cyclic Electron Flow
Author(s) -
BÖHME Herbert
Publication year - 1979
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1979.tb12822.x
Subject(s) - plastoquinone , cytochrome b6f complex , redox , cytochrome f , cytochrome , electron transport chain , spinach , photochemistry , chemistry , chloroplast , electron flow , absorbance , cytochrome b , dcmu , photosynthesis , kinetics , cytochrome c , biophysics , photosystem ii , biochemistry , biology , mitochondrion , photosystem i , thylakoid , inorganic chemistry , chromatography , mitochondrial dna , gene , enzyme , physics , quantum mechanics
In intact spinach chloroplasts cytochrome b 563 and cytochrome f show an antagonistic redox behaviour in the extent and kinetics of light/dark‐induced absorbance changes. The extent of cytochrome b 563 photoreduction appears to be influenced by the redox state of plastoquinone suggesting a regulation of cyclic electron flow at this level. Far‐red illumination induces a membrane state with altered redox reactions of both cytochromes at a more oxidized level.