FIG 5.

Analysis of the promoter region of arsR. (A) DNase I footprinting of the Fur binding site. DNA regions protected by Fur are indicated by a bracket. The arrow indicates the translation start site (ATG) and the transcriptional direction of the arsR gene. (B) Nucleotide sequence spanning the promoter region of the arsR gene. The predicted σ⁷⁰ promoter region is indicated in blue, and the transcriptional start site is indicated in red. The Fur binding site in the predicted promoter region of arsR resulting from the DNase I footprinting is underlined.