We used sequencing and PCR mapping to investigate the regions flanking the blaCMY-2 beta-lactamase gene carried by plasmids from Escherichia coli and Salmonella enterica. Results revealed genetic heterogeneity in the region downstream from blaCMY-2 and identified a putative transposable element bearing blaCMY-2.
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Kang et al. (2006) studied this question.
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