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Recombinational events of plasmid crossing in IS91 coding regions. PCR-generated joint fragments of cointegrated plasmids pSU2600 and pJBS620 are shown (for details, see the text). The distribution of point mutations within the IS91R sequence of ETEC isolate S6 and cointegrate plasmid-derived fragments 1 to 5 is shown. Single point mutations are indicated by the mutated base and depicted as vertical lines. Target sequences are also shown.
