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research-article

Physical map of Campylobacter jejuni TGH9011 and localization of 10 genetic markers by use of pulsed-field gel electrophoresis.

Department of Microbiology, University of Toronto, Ontario, Canada.

ABSTRACT

The physical map of Campylobacter jejuni TGH9011 (ATCC 43430) was constructed by mapping the three restriction enzyme sites SacII (CCGCGG), SalI (GTCGAC), and SmaI (CCCGGG) on the genome of C. jejuni by using pulsed-field gel electrophoresis and Southern hybridization. A total of 25 restriction enzyme sites were mapped onto the C. jejuni chromosome. The size of the genome was reevaluated and was shown to be 1,812.5 kb. Ten C. jejuni genetic markers that have been isolated in our laboratory were mapped to specific restriction enzyme fragments. Furthermore, we have accurately mapped one of the three rRNA operons (rrnA) and have demonstrated a separation of the 16S and 23S rRNA-encoding sequences in one of the rRNA operons.

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