RT Journal Article SR Electronic(1) A1 Kelly, D. P. A1 Syrett, P. J.YR 1964 T1 The Effect of Uncoupling Agents on Carbon Dioxide Fixation by a Thiobacillus JF Microbiology, VO 34 IS 2 SP 307 OP 317 DO https://doi.org/10.1099/00221287-34-2-307 PB Microbiology Society, SN 1465-2080, AB SUMMARY: A newly isolated strain (c) of Thiobacillus thioparus is described. The organism oxidizes thiosulphate, sulphide, tetrathionate or trithionate to sulphate; carbon dioxide fixation is coupled to the oxidation of each of these compounds. Concentrations of arsenate, 2,4-dinitrophenol, and other inhibitors of oxidative phosphorylation, inhibit carbon dioxide fixation without appreciably affecting oxygen uptake. Carbon dioxide fixation coupled to sulphide oxidation is more sensitive to arsenate and 2,4-dinitrophenol inhibition than that coupled to thiosulphate oxidation. This result is consistent with the suggestion that thiosulphate oxidation is linked to a substrate phosphorylation which is relatively insensitive to inhibition by 2,4-dinitrophenol and arsenate., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-34-2-307