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Báo cáo Y học: A novel meta-cleavage dioxygenase that cleaves a carboxyl-groupsubstituted 2-aminophenol Purification and characterization of 4-amino-3-hydroxybenzoate 2,3-dioxygenase from Bordetella sp. strain 10d
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A bacterial strain that grew on 4-amino-3-hydroxybenzoic acidwas isolated fromfarmsoil. The isolate, strain 10d, was identified as a species of Bordetella.CellextractsofBorde-tellasp. strain10dgrownon4-amino-3-hydroxybenzoicacid containedanenzyme that cleaved this substrate.The enzyme was purified to homogeneity with a 110-fold increase in specific activity. The purified enzyme was characterized as a meta-cleavage dioxygenase that catalyzed the ring fission betweenC2 andC3 of 4-amino-3-hydroxybenzoic acid, with the consumption of 1 mol of O2per mol of substrate....
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