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Electrophoresis of PCR product on 1.5% agarose gel for Int2 gene. Lane 1: 100 bp DNA ladder as the molecular size marker; Lane 2: PCR mix with no template (negative control); Lane 3: positive control for Int2 gene; Lane 4: the Int2 gene detected in UPEC strain; Lane 5-8: UPEC strains negative for Int2 gene
