FIG 7.

Schematic representation (A) and genetic organization (B) of the aioX-aioB intergenic region. aioX and aioB are shaded in light and dark gray, respectively. The ribosome binding sites are in bold letters. The −24 and −12 boxes of the σ⁵⁴-dependent promoter of aioB are boxed, and the upstream activating sequence (UAS) likely corresponding to the AioR binding site is indicated above the sequence with converging arrows. The −35 and −10 boxes of the σ⁷⁰-dependent promoter of aioX are boxed with double lines. Transcriptional start sites are indicated in reverse white lettering. The IHF binding site is boxed in bold. The regions where AioF binds are indicated in italics.