title: Chlorophyll levels in the pigment-binding proteins of photosystem II. A study based on the chlorophyll to cytochrome ratio in different photosystem II preparations.
abstract: The chlorophyll levels in pigment proteins of photosystem II were investigated by using photosystem II preparations with different levels of complexity. Based on the assumption that there is 1 cytochrome b559 per reaction centre it has been found that oxygen-evolving complexes containing CP26 and CP29 bind 42 chlorophyll molecules. When CP26 and CP29 are stripped away, the resulting PSII cores bind 30 chlorophyll molecules while CP43-less cores bind approximately 18 chlorophylls. It is therefore concluded that CP47 and CP43 bind 9-12 molecules of chlorophyll a and the D1/D2 complex binds 6 chlorophylls. Taken together CP26 and CP29 bind about 12 chlorophyll molecules.
authors.affiliation: Wolfson Laboratories, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London, UK.
authors.forename: R
authors.initials: R
authors.lastname: Barbato
authors.forename: H L
authors.initials: HL
authors.lastname: Race
authors.forename: G
authors.initials: G
authors.lastname: Friso
authors.forename: J
authors.initials: J
authors.lastname: Barber
mesh_terms: D002734:Chlorophyll / Q000378:metabolism*; D003573:Cytochrome b Group / Q000378:metabolism*; D004591:Electrophoresis, Polyacrylamide Gel; D045342:Light-Harvesting Protein Complexes; D010100:Oxygen / Q000378:metabolism; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism*; D045332:Photosystem II Protein Complex
chemical_list: D003573:Cytochrome b Group; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D002734:Chlorophyll; C019313:cytochrome b559; D010100:Oxygen