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bc1 complex and its relationship to the b6f complex Introduction The cytochrome b6f complex is the intermediate protein complex in linear photosynthetic elecron transport. It is found in the thylakoid membrane of higher plants and cyanobacteria. The core complex is comprised of four proteins: cytochrome b6, subunit IV, cytochrome f, and the Rieske center, an iron-sulfur protein. Electrons are transferred through the b6f complex through a plastoquinol, leading to the formation of a plastoquinone and 2H+ in the thylakoid lumen. The terminal electron acceptor in the b6f complex is cytochrome f, which is oxidized by plastocyanin.
Q-cycle
bc1 and b6f sites of interest
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