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Catechol 1,2 dioxygenase (1,2-CTD) catalyzes an intradiol cleavage reaction of catechol to form cis,cis-muconate. 1,2-CTDs is homodimers with one catalytic non-heme ferric ion per monomer. They belong to the aromatic dioxygenase family, a family of mononuclear non-heme iron intradiol-cleaving enzymes that catalyze the oxygenation of catecholates to aliphatic acids via the cleavage of aromatic rings.
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