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(A) Electromobility shift assay in which 40 ng of a 351-bp DNA fragment encompassing the intergenic region upstream of mexAB-oprM was incubated with increasing concentrations of purified AmgR as indicated. (B) Electromobility shift assay in which the above-mentioned 351-bp DNA fragment was incubated with the indicated concentration of AmgR in the absence (-) and presence (+) of 200 ng of sheared salmon sperm DNA (sssDNA).
