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. 1992 Jan;58(1):409-11.
doi: 10.1128/aem.58.1.409-411.1992.

Specific deuteration of dichlorobenzoate during reductive dehalogenation by Desulfomonile tiedjei in D2O

G D Griffith  1 , J R Cole, J F Quensen 3rd, J M Tiedje
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Specific deuteration of dichlorobenzoate during reductive dehalogenation by Desulfomonile tiedjei in D2O

G D Griffith et al. Appl Environ Microbiol. 1992 Jan.

Abstract

Desulfomonile tiedjei DCB-1 is a strict anaerobe capable of reductively dechlorinating meta-chlorobenzoates. To probe the mechanism of this aryl dechlorination, we incubated cell suspensions of D. tiedjei in D2O and with 2,5-dichlorobenzoate. The deuterium was incorporated into the dechlorination product exclusively at the position of dehalogenation, as shown by gas chromatography-mass spectrometry and proton magnetic resonance analyses. These results favor a model for dechlorination that should not allow proton exchange at other positions, as would be the case if partial ring reduction occurred.

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