BI110 Chapter Notes - Chapter 30: Cytochrome B6F Complex, P680, Photosystem I
Document Summary
Named in the order they were discovered, not the order they appear in photosynthesis. Absorbs 700 nm of light waves (p700) Absorbs 680 nm of light waves (p680) Electron in p680 raised from ground state to excited state . P680* is oxidized to p680+ by primary electron acceptor. Pheo transfers electron to pq cytochrome complex. P680 is reformed when p680* grans an electron from oxidation of h2o. Linear electron transport i oxidation of p680 in photosystem ii. Absorption of light by psii results in formation of p680* P680* oxidized to p680+ by primary electron acceptor pheophytin (pheo) Linear electron transport ii oxidation-reduction of plastoquinone pool. Electron given up by chlorophyll and transferred to plastoquinone (pq) is replaced by oxidation of water. Pq also takes a h+ from stroma and migrates thru lipid bilayer. Linear electron transport iii - electron transfer from cytochrome complex to pc. The cytochrome complex transfers electrons to pc (plastocyanin)
