FIG. 3.

Localization of protein binding sites within the sinIR upstream region. Boxes represent the binding regions of the indicated proteins on the nontemplate strand that corresponds to the DNase I footprinting regions identified for the template strand (Fig. 2). Dashed lines beneath the Hpr binding regions are sequences with homology to the putative Hpr recognition element. The dashed line beneath the Spo0A binding region is a sequence similar to the 0A box (TGTCGAA on the strand shown). P1 indicates the transcriptional start site of the sinIR promoter, which is postexponentially activated (17).