PBGS Protein Sequence Alignment. Amino acid sequences as predicted from published DNA sequences for R. capsulatus PBGS and R. sphaeroides PBGS as well as the PCR product sequences from our genomic R. capsulatus DNA (labeled as revised sequence). Sequence identity between all three sequences is boxed. The regions where the published R. capsulatus sequence and the sequence we determined differ are indicated with an asterisk below those amino acid positions. In these regions, a black background indicates where sequence matches occur between the revised sequence for R. capsulatus PBGS and R. sphaeroides PBGS, but not for the previously published R. capsulatus PBGS sequence.