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PCR results for qnrA, B, and S genes. Lane numbers 1, 2, and 3 show a 417-bp fragment of qnrS. Lane numbers 5, 6, and 7 show a 469-bp fragment of qnrB. Lane numbers 9, 10 and 11 show a 516-bp fragment of qnrA. Lane M represents a 100-bp DNA marker. Lanes 4, 8, and 12 are the negative controls
