title: Some photoreactions of isolated cytochrome b-559.
abstract: Cytochrome b-559 was isolated from spinach and the alga Bumilleriopsis filiformis (Xanthophyceae) and characterized by functional properties: (a) It was active as electron acceptor in a diaphorase system using NADPH as donor and ferredoxin and ferredoxin-NADP reductase as redox proteins. (b) It exhibited photooxidation with Photosystem-I particles, when illuminated with 707 nm light. (c) It was photooxidized by Photosystem-II particles and 652 nm light at room temperature. Light greater than 702 nm was ineffective. The data corroborate previous reports on redox reactions of bound cytochrome b-559.
mesh_terms: D002736:Chloroplasts / Q000378:metabolism* / Q000648:ultrastructure; D003580:Cytochromes / Q000378:metabolism*; D004579:Electron Transport; D056890:Eukaryota; D005288:Ferredoxins / Q000378:metabolism; D008027:Light; D010084:Oxidation-Reduction; D010777:Photochemistry; D010788:Photosynthesis; D010944:Plants; D012995:Solubility
chemical_list: D003580:Cytochromes; D005288:Ferredoxins