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Binding of apo- and holoFnr to promoter regions of fnr, hbl and nhe genes determined by EMSA. DNA probes corresponding to fnr (A), nhe (B), hbl1 (C), hbl2 (D) and a negative control (E) were bound with increasing concentrations of apoFnr (−) and holoFnr (+) as indicated. The results are representative of triplicate experiments.
