All well-characterized photosynthetic reaction centers contain quinone molecules. Type II reaction centers, such as Photosystem II (PS II), contain two quinones, one that functions as a bound one-electron acceptor, and the other that functions as a mobile two-electron (and two-proton) accumulator. In PS II, plastoquinone-9 (PQ-9) serves the role of the mobile quinone, which shuttles electrons to Photosystem I (PS I) via the cytochrome b f complex. Type I reaction centers, such as PS I of cyanobacteria and green plants, contain two bound phylloquinones (PhQ - vitamin K, 2-methyl-3-phytyl-1,4-naphthoquinone).
|Original language||English (US)|
|Title of host publication||CRC Handbook of|
|Subtitle of host publication||Organic Photochemistry and Photobiology, Second Edition|
|ISBN (Print)||0849313481, 9780849313486|
|State||Published - Jan 1 2003|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)