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  • Title: Thiosulfate formation and associated isotope effects during sulfite reduction by Clostridium pasteurianum.
    Author: Chambers LA, Trudinger PA.
    Journal: Can J Microbiol; 1979 Jun; 25(6):719-21. PubMed ID: 476549.
    Abstract:
    During growth of Clostridium pasteurianum on sulfite, approximately half the sulfite was reduced to sulfide and half to thiosulfate. Sulfide was enriched in 32S or 34S at different stages of growth and thiosulfate was enriched in 32S, particularly in the sulfane atom. It is suggested that thiosulfate in these bacterial cultures arose from a secondary chemical reaction. The chemical formation of thiosulfate from sulfide and sulfite was also accompanied by sulfur isotope fractionation. The implications of these results with respect to 'inverse' isotopic effects are discussed.
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