title: Estimation of chlorophyll a distribution in the photosynthetic pigment systems I and II of the blue-green alga Anabaena variabilis.
abstract: Chlorophyll a distribution in pigment systems I and II was estimated with the blue-green alga Anabaena variabilis by two methods: first, with intact cells using delayed light emission as an index reaction; second, by measuring the 2,6-dichlorophenolindophenol-Hill reaction and the cytochrome c photooxidation in membrane fragments. The first estimation indicated that 0.053+/-0.014 of total chlorophyll a functions as a component of pigment system II, and the second method 0.086+/-0.012. Though the values were somewhat different in the two methods, both estimations indicated that pigment system II chlorophyll a occupies a very small fraction of total chlorophyll a.
mesh_terms: D002734:Chlorophyll / Q000378:metabolism*; D000458:Cyanobacteria / Q000187:drug effects / Q000378:metabolism*; D003574:Cytochrome c Group / Q000378:metabolism; D004237:Diuron / Q000494:pharmacology; D006096:Gramicidin / Q000494:pharmacology; D007700:Kinetics; D008027:Light; D008433:Mathematics; D010084:Oxidation-Reduction; D010785:Photophosphorylation / Q000187:drug effects; D010788:Photosynthesis / Q000187:drug effects; D010860:Pigments, Biological / Q000378:metabolism*; D011789:Quantum Theory; D013696:Temperature
chemical_list: D003574:Cytochrome c Group; D010860:Pigments, Biological; D006096:Gramicidin; D002734:Chlorophyll; D004237:Diuron