Fig. 1
From: Mix-and-matching as a promoter recognition mechanism by ECF σ factors
Promoter structure in σ70 family: The promoter organization for RpoD (E. coli RpoD in the upper part of the figure) and ECF group (E. coli σE and B. subtilis σW in the lower part of the figure) is shown; the promoter elements implicated in dsDNA interactions with σ factor are shown in green/black, and shaded with the red rectangle; the promoter elements implicated in ssDNA interactions with σ factor are shown in red, and shaded with the green rectangle