FIG 6.

Model showing similarity of lsrAP₂ to the class III CRP-dependent promoter, in which regulation of lsrAP₂ may require the interaction of RNA polymerase (RNAP) α subunit C-terminal domains (αCTD) with bound CRP. The locations of the three putative lsrA promoters (lsrAP₁, lsrAP₂, and lsrAP₃) are shown along the bottom of the figure, and the putative −10 and −35 sites for each are represented by black boxes. The two lsrR promoters (lsrRP₁ and lsrRP₂) are shown at the top of the figure, and the putative −10 and −35 sites for each are represented by gray boxes. CRP binding sites are indicated by opposing arrows.