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BrxB is required for optimal resistance to CHP. Zone of inhibition assays were done using WT, brxA, brxB, and brxA brxB double-mutant (brxAB) strains. The area of inhibition was determined for each condition and is reported as average and standard deviation relative to the wild-type control (n>3). The sensitivity phenotype was complemented by the expression of brxB (but not by brxA) after induction from a xylose-dependent promoter.
