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Pathways of H2S biosynthesis (see text for details). DHLA, dihydrolipoic acid; CAT, cysteine aminotransferase; CBS, cystathionine β-synthase; CSE, cystathionine γ-ligase; ST, sulfur transferase; TR, thiosulfate reductase; Trx, thioredoxin; 3-MST, 3-mercaptopyruvate sulfur transferase.
