FIG. 2.

Autoradiogram of PFGE-separated NotI (lane a), SfiI (lane b), and CeuI (lane c) fragments of genomic DNA of V. cholerae O139 strain SG24. DNA in an agarose block was digested with the enzyme, end labeled with [α-³²P]dCTP, and electrophoresed as described in the legend to Fig. 1. The gels were dried and exposed to X-ray film. Restriction fragments were named on the basis of the enzymes that generated the fragments (N, NotI; S, SfiI; C, CeuI) and were numbered on the basis of size in descending order.