Figure 1.

Sequence comparison of the distal rpoH regulatory region of different enteric bacteria. Distal rpoH regulatory regions were compared with that of E.coli K12. Sites similar to the –35 and –10 sites of the E.coli K12 promoter P1 are boxed. Vertical arrow, transcription start-site for promoter P1; opposite arrows under the sequences, inverted repeats of the transcriptional terminator of ftsX. Nucleotide positions relative to the +1 of each sequence are indicated on the right. EcK, E.coli K12; Ec, E.coli; Se, S.enterica serovar Typhimurium; Sf, S.flexneri; Kp, K.pneumoniae; Ecl, E.cloacae; Cf, C.freundii; Yf, Y.frederiksenii; Pm, P.mirabilis. Identical residues are represented by a dot and substituted residues are indicated by the relevant letter. Dashed lines, introduced gaps to maximize the alignment.