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PfiAT binds to inverted repeats in the promoter of the pfiAT operon.
A. DNase I footprinting assay demonstrated that the PfiAT complex bound to the DNA motif containing 5′‐AATTCN5 GAATT‐3′.
B. The promoter activities of the mutated promoters were determined in strains PAO1 and ΔpfiAT. Three independent cultures of each strain were used, and error bars indicate standard deviation. **P < 0.01.
