Results 91 to 100 of about 1,210 (138)
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On the ATP generation by Chromatium in darkness
Archiv f�r Mikrobiologie, 1968In Chromatium strain 6412 storage carbohydrate synthesized in the light, gradually disappeared in the dark. Simultaneously, poly-β-hydroxybutyric acid (PHB) was produced, CO2 was released and intracellular elemental sulfur was reduced to sulfide. Expressed on a molar base, the ratio between storage carbohydrate monomer (as glucose) consumed, sulfur ...
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Photophosphorylation by subcellular particles from Chromatium
Biochimica et Biophysica Acta, 1957Abstract A light-induced phosphorylation of adenosine diphosphate has been studied, using pigmented particles derived from sonic extracts of the obligately-anaerobic photosynthetic purple sulfur bacterium Chromatium . The reaction requires magnesium ions and anaerobic conditions or the presence of a reducing agent.
J W, NEWTON, M D, KAMEN
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The flavin of Chromatium cytochrome c-552
Biochemical and Biophysical Research Communications, 1971Abstract A flavin obtained from Chromatium cytochrome c -552 has been purified and characterized with respect to its neutral and acid absorption spectra, fluorescence-pH relationship, and behavior on partition and molecular exclusion chromatography.
R, Hendriks, J R, Cronin
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Growth measurements of Chromatium cultures
Archiv f�r Mikrobiologie, 1968The optical density of Chromatium cultures grown anaerobically in the light with sulfide as electron donor is mainly determined by the sulfur content of the cells. Since the sulfur content varies, growth cannot be followed in this way. However, optical density measurements are very useful to characterize the moment of sulfide depletion and maximal ...
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A low potential photosystem in Chromatium D
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1971A low potential light reaction in chromatophores of Chromatium D has been studied by means of oxidation—reduction potential titrations of laser-induced absorbance changes at 435 nm and 410 nm. This reaction, operating at potentials which are low enough to inactivate the P883 (P435) reaction center, has an apparent Em of −145 mV and is attenuated as the
M, Seibert, P L, Dutton, D, Devault
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Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1968
Abstract Fractionation of Chromatium Strain D chromatophores by centrifugation in sucrose density gradients results in two fractions, designated ‘light’ and ‘heavy’. The light particles are enriched in photosynthetic pigments, are relatively homogeneous and can be prepared reproducibly.
M A, Cusanovich, M D, Kamen
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Abstract Fractionation of Chromatium Strain D chromatophores by centrifugation in sucrose density gradients results in two fractions, designated ‘light’ and ‘heavy’. The light particles are enriched in photosynthetic pigments, are relatively homogeneous and can be prepared reproducibly.
M A, Cusanovich, M D, Kamen
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Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1968
Abstract Photophosphorylation at relatively high rates occurs in light-particle preparations described previously as derived from Chromatium chromatophores. It is shown that the optimal conditions for photophosphyorylation correlate with changes in absorbance established in previous researches as the result of ambient redox potentials between 50 ...
M.A. Cusanovich, M.D. Kamen
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Abstract Photophosphorylation at relatively high rates occurs in light-particle preparations described previously as derived from Chromatium chromatophores. It is shown that the optimal conditions for photophosphyorylation correlate with changes in absorbance established in previous researches as the result of ambient redox potentials between 50 ...
M.A. Cusanovich, M.D. Kamen
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Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1974
Initial rates of the light-induced absorption decrease in Chromatium chromatophores due to the oxidation of cytochromes were measured under various experimental conditions. The initial rate in the presence of 10 mM potassium ferrocyanide and 50 μM potassium ferricyanide was about one-half to two-thirds of that in the presence of 30 mM ascorbate or in a
K, Takamiya, M, Nishimura
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Initial rates of the light-induced absorption decrease in Chromatium chromatophores due to the oxidation of cytochromes were measured under various experimental conditions. The initial rate in the presence of 10 mM potassium ferrocyanide and 50 μM potassium ferricyanide was about one-half to two-thirds of that in the presence of 30 mM ascorbate or in a
K, Takamiya, M, Nishimura
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Isolation and Characterization of the Lipopolysaccharide of Chromatium vinosum
European Journal of Biochemistry, 1976Lipopolysaccharide was isolated from Chromatium vinosum by phenol/water extraction. The lipopolysaccharide is found exclusively in the phenol phase and can be cleaved into a sugar moiety and a lipid A fraction by hydrolysis in 10 % acetic acid at 100 °C for 3‐4 h.
R E, Hurlbert +3 more
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Variable cellular composition of Chromatium in growing cultures
Archiv f�r Mikrobiologie, 1970Chromatium strain D was grown on autotrophic medium with sulfide as the sole electron donor and on heterotrophic media. The following growth parameters were monitored: sulfide, intracellular sulfur, cell number, bacteriochlorophyll, protein, storage polysaccharide, dry weight, and turbidity.
G L, Schmidt, M D, Kamen
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