FIG. 1.

Identification of Salmonella-specific DNA fragment in 91- to 96-min region. (Top) Ethidium bromide staining of EcoRI-digested fragments resolved in a 0.7% agarose gel from 19 overlapping lambda DASHII clones covering the 91- to 96-min region. (Bottom) A Southern blot was generated from the gel shown in panel A and hybridized at low stringency with radiolabelled probe made from E. coli total genomic DNA. Arrows indicate Salmonella-specific DNA fragments that did not hybridize with E. coli total genomic DNA. Molecular sizes are shown on the right in kilobases.