cytochrome b6f complex cyt b6-f complex cyt b6f complex GO:0009512 Wikipedia:Cytochrome_b6f_complex cytochrome b6/f complex cyt b6/f complex cytochrome b(6)f complex Complex that transfers electrons from reduced plastoquinone to oxidized plastocyanin and translocates protons from the stroma to the lumen. The complex contains a core structure of three catalytic subunits: cytochrome b, the Rieske iron sulfur protein (ISP), and cytochrome f, which are arranged in an integral membrane-bound dimeric complex; additional subunits are present, and vary among different species. cyt b(6)f complex cytochrome b6-f complex cellular_component protein complex thylakoid part