Potassium ion transport and electrogenesis in Anabaena variabilis.
نویسندگان
چکیده
منابع مشابه
Ammonium (methylammonium) transport by heterocysts and vegetative cells of Anabaena variabilis.
Transport of the ammonium analogue [(14)C]methylammonium was similar in non-growing, fully differentiated heterocysts as compared to vegetative, multiplying cells of the filamentous cyanobacterium Anabaena variabilis. NH(4)(+) inhibited uptake into the cells and released accumulated methylammonium from the cells. These observations suggest that the main function of ammonium transport in heteroc...
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High-affinity vanadate transport systems have not heretofore been identified in any organism. Anabaena variabilis, which can fix nitrogen by using an alternative V-dependent nitrogenase, transported vanadate well. The concentration of vanadate giving half-maximum V-nitrogenase activity when added to V-starved cells was about 3 x 10(-9) M. The genes for an ABC-type vanadate transport system, vup...
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A cell-free system exhibiting both photophosphorylation (P /2e = 1) and oxidative phosphoryla tion (P/O up to 0 .8 ) is described for the cyanobacterium Anabaena variabilis. NADH and N A D PH were found to be equally effective as electron donors for oxidative phosphorylation. Low concentrations of U H D B T , an inhibitor of the cytochrome blc complex of mitochondria and chloroplasts. were fou...
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Transport of Na+ and its relationship with membrane potential (delta psi m) was examined in Anabaena L-31 (a fresh water cyanobacterium) and Anabaena torulosa (a brackish water cyanobacterium) which require Na+ for diazotrophic growth. The data on the effect of N,N'-dicyclohexylcarbodiimide indicated that delta psi m was generated by electrogenic proton extrusion predominantly mediated by ATPas...
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The chlorophyll-containing lamellar structures isolated from Anabaena variabilis have the ability to oxidize reduced mammalian cytochrome c in the dark. This activity is oxygen dependent and heat labile. As with other cytochrome oxidase preparations, activity is stimulated by detergents and is sensitive to the ionic strength of the assay solution. The cytochrome oxidase activity is not inhibite...
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ورودعنوان ژورنال:
- Biochemical Society transactions
دوره 8 6 شماره
صفحات -
تاریخ انتشار 1980