FIG. 7.

Comparison of SRA and its homologs. (A) Alignment of amino acid sequences of SRA proteins from E. coli (ECO), Salmonella serovar Typhimurium (STM), Salmonella serovar Typhi (STY), Salmonella serovar Paratyphi (SPA), and K. pneumoniae (KPN). Dark boxes indicate complete sequence identity in all, and light boxes indicate identity in three or four organisms. (B) Alignment of the nucleotide sequence of the region upstream of the sra gene. Shaded boxes indicate identity in at least four organisms. The asterisk, −10 and −35, and SD show the transcriptional start site, RNA polymerase consensus sequences, and Shine-Dalgarno sequence of the E. coli sra gene, respectively.