R. elti rpoE4 motifs located in the regulatory regions of rpoE4-regulated genes. (A) Alignment of nucleotide sequences of upstream regions of rpoE4-regulated genes (motifs are shown in boldface, uppercase letters and are underlined); (B) WebLogo of the rpoE4 consensus motifs; (C) alignment of R. etli rpoE4 consensus motifs with promoter sequences of S. meliloti rpoE2, C. crescentus sigT, M. ex torquens AM1 phyR, M. tuberculosis sigH, E. coli rpoE, S. coelicolor sigR, R. sphaeroides rpoE, B. subtilis sigW, and P. aeruginosa algU (4, 5, 17, 22, 34, 39, 41, 48).