Chromatium


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Chromatium

[krō′māsh·ē·əm]
(microbiology)
A genus of bacteria in the family Chromatiaceae; cells are ovoid to rod-shaped, are motile, do not have gas vacuoles, and contain bacteriochlorophyll a on vesicular photosynthetic membranes.
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El primero, blanco en superficie y verde y negro en el interior, se compone en la superficie, de bacterias quimiolitotrofas del azufre (Thiothrix), cianobacterias (Lyngbia y Anabaena), bacterias purpuras del azufre (Chromatium, Thyocistis) y en el interior bacterias fototrofas anoxigenicas verdes (Chloroflexus) y purpuras (Rhodomicrobium).
Guerrero, "A quantitative ultrastructural study of Chromatium minus in the bacterial layer of Lake Cisoe (Spain)," Archives of Microbiology, vol.
The bacteria involved include Azotobacter, Clostridium, Chromatium and Chlorobium (Burris 2002).
These were assigned as 1 CO and 2 [CN.sup.-] for Dg enzyme, (74) as well as for similar [NiFe]-enzyme from Chromatium vinosum, (84) whereas the electron density of one of three ligands (L1 of Fig.
(1975) Structural and catalytic properties of hydrogenase from Chromatium. Biochemistry 14, 2561-2568.
El sistema genetico tipo III, se encuentra en Chromatium vinosum, Synechocystis sp.
The second column represents a lake of the Archaean Eon (3500 million years ago) and holds an anaerobic community predominated by purple sulfur phototrophic bacteria (Chromatium sp., Thiocapsa sp.) and green sulfur bacteria (Chlorobium sp.).
Despite the abundance of the isolates in the samples, Serratia marcescens, Escherichia coli, Enterobacter aerogenes, Chromatium sp, and Erwinia amylovora exhibited minimal growth towards the end of incubation period indicating weak ability to utilize the PAH.
Hasta el momento, se conocen tres ejemplos de procariotes que desempenen este papel ecologico: Vampirococcus sp., que ataca epibioticamente diferentes especies de bacterias purpuras sulfurosas pertenecientes al genero Chromatium y que no ha sido posible cultivar en medios axenicos.
Light levels as low as 1% of the incident near-infrared radiation (800 to 900 nm) are sufficient for Chromatium, a phototrophic purple sulfur bacterium, to dominate the chemocline (Fig.
Below Microcoleus are the red and green sulphur bacteria, including salmon-colored colonies of Thiocapsa, pink swimming Chromatium, and the strictly anaerobic green Chlorobium.
Lipases provide a new mechanistic model for polyhydroxybutyrate (PHB) synthases: characterization of the functional residues in Chromatium vinosum PHB synthase.