title: Photooxidation of P-960 and photoreduction of P-800 (bacteriopheophytin b-800) in reaction centers from Rhodopseudomonas viridis.
abstract: The light excitation of P-960 results in the oxidation of P-960 and the reduction of P-800 (bacteriophytin b-800) in the reaction centers from Rhodopseudomonas viridis. A negative 847 nm band of the circular dichroism psectrum disappears under P-960 photooxidation, while a positive 827 nm band disappears under P-800 photoreduction. Exciton interaction of the pigment molecules in the reaction center is discussed.
mesh_terms: D020130:Bacterial Chromatophores / Q000378:metabolism / Q000648:ultrastructure; D001429:Bacteriochlorophylls / Q000378:metabolism*; D001665:Binding Sites; D002734:Chlorophyll / Q000031:analogs & derivatives*; D002942:Circular Dichroism; D003624:Darkness; D008027:Light; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D010860:Pigments, Biological / Q000378:metabolism; D012241:Rhodopseudomonas / Q000378:metabolism* / Q000648:ultrastructure; D013053:Spectrophotometry
chemical_list: D001429:Bacteriochlorophylls; D010860:Pigments, Biological; D002734:Chlorophyll