FIG. 1.

Locations of hypothetical mar boxes in the possible promoter region of the R. capsulatus nprA gene. (A) Sequence of the putative promoter region of the nprA gene. Arrows indicate the localization and orientation of the two hypothetical mar boxes. The putative −10 and −35 heptamers are indicated by dotted lines, and the translation start codon is shown in bold. (B) Sequence alignment of the hypothetical mar boxes of R. capsulatus nprA and E. coli nfnB. The recognition elements RE1 and RE2 for MarA binding are indicated in squares, and the internal conserved nucleotides are shown in bold.