Protocatechuic acid oxygenase

Gentisic acid is also a substrate for a specific inducible enzyme of Pseudomonas (Lack, 1959). The nature of the reaction catalyzed by this enzyme appears to be similar to that of the catechol 2 3-oxygenase and protocatechuic 4 5-oxygenase. A partially purified enzyme was found to form maleylpyruvate as the first product (Fig. 10). Subsequent isomeri-... 

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