18O studies of pyrogallol cleavage by catechol 1,2-dioxygenase.

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18O studies of pyrogallol cleavage by catechol 1,2-dioxygenase.

18O labeling studies on the catechol 1,2-dioxygenase-catalyzed oxidative cleavage of pyrogallol demonstrate that the enzyme functions both as a dioxygenase and a monooxygenase in this reaction. Two products are observed, 2-pyrone-6-carboxylic acid, 99% singly labeled at the carboxylate, and 2-hydroxy-cis,cis-muconic acid, 74% doubly labeled (one 18O at each carboxylate) and 24% single labeled (...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1984

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(18)90655-1