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The pathways of H2S synthesis and removal (CBS: cystathionine β-synthase; CSE: cystathionine γ-lyase; CAT: cysteine aminotransferase; 3-MST: 3-mercaptopyruvate sulfurtransferase; SQR: sulfide quinone oxidoreductase; SDO/ETHE1: sulfur dioxygenase; SUOX: sulfite oxidase; TST: thiosulfate sulfur transferase; GSH: glutathione; UQ: quinone; cIII: complex III; cIV: complex IV).
