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Agricultural and Biological Chemistry
Vol. 29 (1965) No. 12 P 1069-1073

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http://doi.org/10.1271/bbb1961.29.1069


Quantitative oxidation of tetrathionate to sulfate was achieved with freshly harvested cells of T. thiooxidans; pH optimum for the oxidation of tetrathionate by the washed cells was 2_??_3, and the activity fell markedly at pH above 3.5.
Tetrathionate might be enzymatically dismuted to pentathionate and trithionate under anaerobic conditions with crude extracts of T. thiooxidans; pH optimum for the reaction was about 2.7 and the activity fell strikingly at pH 4.7. The formed trithionate might be further hydrolyzed to thiosulfate and sulfate.

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