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FimY and FimZ are activators and FimW is a repressor of fim gene expression. Shown is a comparison of the PfimA, PfimY, PfimZ, and PfimW promoter activities in the wild type and the ΔfimY, ΔfimZ, ΔfimYZ, and ΔfimW mutants. Data are averages of the results from three experiments. Each experiment was done in triplicate.
