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. 2016 Nov 17;9(1):96–111. doi: 10.15252/emmm.201606356

Figure 1. Mitochondrial H2S oxidation pathway.

Figure 1

SQR converts sulfide into thiosulfate by transferring two electrons from the H2S oxidation to ubiquinone (CoQ). Thiosulfate is then converted into sulfite by TST and ETHE1; this reaction requires a sulfur acceptor (glutathione, GSH). Excess of sulfite is converted into sulfate by SUOX.