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Enzyme catalysis of H2S production. Endogenous H2S can be produced by two ways: enzyme catalysis and nonenzyme catalysis. Enzyme catalysis is the main way and is catalyzed by four enzymes, such as CBS, CSE, 3‐MST and DAO. By Figdraw. H2S, hydrogen sulfide; CBS, cystathionine β‐synthase; CSE, cystathionine γ‐lyase; PLP, pyridoxal‐5′‐phosphate; 3‐MST, 3‐mercaptopyruvate sulfurtransferase; 3‐MP, 3‐methylpyridine; CAT, cysteine aminotransferase; DAO, D‐amino acid oxidase.
