Figure 1.

Alignment of rne gene sequences. The sequence of the promoter region, the beginning and end of the 5′ UTR, and the first 21 nucleotides of the coding region are shown for the rne genes from six different bacterial species. The conserved −35 and −10 promoter elements are enclosed in boxes, as are abbreviated representations of the rne 5′ UTR sequences, which are each 0.3–0.4 kb in length. The amino acid residues specified by the first seven codons of all six rne genes are indicated (single-letter code). The 5′ end of the E. coli rne transcript has been mapped previously by primer extension analysis (Jain and Belasco 1995).