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. 2007 Mar 16;73(10):3320–3326. doi: 10.1128/AEM.02994-06

FIG. 6.

FIG. 6.

Pathway proposed for the degradation of 4-t-butoxyphenol by an ipso-substitution mechanism in Sphingobium xenophagum Bayram. Growth experiments with 18O-labeled oxygen and water show that the ether oxygen in the alkoxyphenol was fully retained in the t-butanol metabolite. AH2 and A, an unidentified pair of reduced and oxidized cosubstrates, respectively.