FIG. 1.

Alignment of the amino acid sequences of the RegB protein from R. capsulatus as previously published (22), of the RegB protein as deduced from our corrected DNA sequence, and RegB homologue PrrB (9) of R. sphaeroides. The positions of fusion to the lacZ gene and the β-galactosidase activities of the fusion proteins (where synthesized) in R. capsulatus are indicated. The strategy for construction of the gene fusions is identical to the strategy used for the other regB-lacZ fusions as described in the text and shown in Fig. 2. Vertical lines identify identical amino acids, and asterisks indicate similar amino acids. The putative ribosome binding site is underlined.