FIG. 6.

Genotypic differences in C. jejuni F38011 isolates observed by mrp-PFGE. Bacteria were lysed in PFGE-grade agarose, and DNA was digested with the restriction enzyme SmaI. DNA fragments were separated by contour-clamped homogeneous electric field electrophoresis through a 1% (wt/vol) agarose gel. Lanes: 1 and 4, phage lambda size markers (in kilobases) (New England Biolabs); 2 and 5, C. jejuni F38011 wild-type isolate; 3, C. jejuni F38011 mouse-derived variant F38011mv; 6, C. jejuni F38011 plate-derived variant. The altered fragment is noted in black. The molecular sizes are provided to the left of the figure.