Alignment of partial amino acid sequences of the RecA proteins of E. coli, L. biflexa, B. burgdorferi, B. hermsii, B. coriaceae, B. miyamotoi, and B. turicatae. The boxes indicate the identified functional sites of the E. coli RecA protein (25). The numbering of residues is the numbering for the full-length E. coli RecA protein (accession number NC_000913).