Abstract
In cultures of Streptomyces fradiae on wool as the only source of nutrition inorganic thiosulfate (in amounts up to 0.5 mg of Na2S2O3·5 H2O/ml) was formed as the final product of metabolization of sulfur from cystine of keratin proteins. The presence of thiosulfate was proved by qualitative tests and thin-layer chromatography and estimated quantitatively by spectrophotometry, titrimetry, and capillary isotachophoresis. Metabolization of organic sulfur to thiosulfate excreted into the medium is a process not yet described in microorganisms.
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Kunert, J., Stránský, Z. Thiosulfate production from cystine by the keratinolytic prokaryote Streptomyces fradiae . Arch. Microbiol. 150, 600–601 (1988). https://doi.org/10.1007/BF00408257
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DOI: https://doi.org/10.1007/BF00408257