erinevatest alaühikutest koosnev kloroplastide tülakoidide membraanis paiknev valguline kompleks, mis osaleb elektronide liikumises fotosüsteemilt II fotosüsteemile I, The cytochrome b6f complex is a protein complex found in the thylakoid membrane in chloroplasts of plants, cyanobacteria, and green algae, that catalyzes the transfer of electrons from plastoquinol to plastocyanin. During photosynthesis, the cytochrome b6f complex is one step along the chain that transfers electrons from Photosystem II to Photosystem I.