[Fractionation of sulfur isotopes by phototrophic sulfur bacterium Ectothiorhodospira shaposhnikovii]

Mikrobiologiia. Sep-Oct 1976;45(5):757-62.
[Article in Russian]


Two processes of sulphur isotope fractionation have been found in experiments with the sulphur purple bacterium Ectothiorhodospira shaposhnikovii. As a result, a light isotope, 32S, is concentrated in residual hydrogen sulphide, and a heavy isotope, 34S, in elementary suphur which is deposited outside the cell. The sulphate produced is lighter than elementary sulphur. Fractionation of sulphur isotopes is observed in natural conditions and is confined to places of mass growth of photosynthetic sulphur bacteria.

Publication types

  • English Abstract

MeSH terms

  • Chemical Fractionation
  • Chromatiaceae / metabolism*
  • Hydrogen Sulfide / metabolism
  • Photosynthesis
  • Sulfates / metabolism
  • Sulfur / metabolism
  • Sulfur Isotopes*


  • Sulfates
  • Sulfur Isotopes
  • Sulfur
  • Hydrogen Sulfide