FIG. 5.

Sequences of some promoters similar to NtcA-activated promoters. Tsps are indicated by boldface lowercase letters (see the text for references). The location of the tsp with respect to the translation start of the corresponding gene is indicated. Shaded boxes denote the putative NtcA-binding sites (left boxes) and −10 promoter hexamers (right box), respectively. The consensus sequence for the NtcA-activated promoters derived from data in Fig. 4 is presented at the bottom for comparison. W, A or T; Y, C or T; R, A or G.