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Examples of TprK V7 sequences among secondary lesions compared to the inoculum. For each lesion (identified by number on the left), DNA sequences were obtained from 10 Escherichia coli clones containing the tprK ORF. Note that the sequence variation in V7 is seen as insertions/deletions and base changes (numbers at the top indicate base pair positions). The identity, or near identity, of the 10 sequences within each lesion supports the single-cell origin of the lesion.
