Abstract
Thiocapsa floridana strain 1711, andChromatium strains 1611 and 6412 can grow with molecular hydrogen replacing sulfide as the electron donor. Sulfate suffices as the sulfur source. The incorporation of radioactive sulfur from35S-sulfate was measured in growing cells in which molecular hydrogen or acetate was the electron donor. In cells pre-grown in sulfide, the incorporation of radioactivity began slowly after a lag period; in contrast, cells grown in sulfate took up the marker at a faster rate and without a lag. The radioactivity appeared in protein as cysteine and methionine. No elimination of sulfide was detected during growth. Thus, the reduction of sulfate was purely assimilatory.
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Thiele, H.H. Sulfur metabolism in Thiorhodaceae. IV. Assimilatory reduction of sulfate byThiocapsa floridana andChromatium species. Antonie van Leeuwenhoek 34, 341–349 (1968). https://doi.org/10.1007/BF02046456
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DOI: https://doi.org/10.1007/BF02046456