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The Leptospira meyeri serovar semaranga metX gene was identified by complementation of an Escherichia coli metA mutant, i.e., devoid of homoserine O-succinyltransferase. However, the MetX protein exhibited a homoserine O-acetyltransferase activity in agreement with its similarity to homoserine O-acetyltransferases. Reverse transcription-PCR analysis demonstrated that metX is the second gene of an operon.
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Bourhy et al. (1997) studied this question.
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