FIG. 3.

Schematic overview of the soxA locus of R. sulfidophilum and related gene clusters in other bacteria. The predicted identities of the gene products are indicated under the gene designations where appropriate. Signal peptide coding regions are indicated in black for Sec signal peptides and are hatched for Tat signal peptides. Both C. tepidum and A. aeolicus produce multiple proteins with homology to the R. sulfidophilum SoxF flavoprotein. The sequence of the R. sulfidophilum soxA locus was determined in the present work and has been deposited in the GenBank database with accession number AY005800. Preliminary sequence data for C. tepidum were obtained from the Institute for Genomic Research website (http://www.tigr.org) and for R. palustris from http://www.jgi.doe.gov/JGI_microbial/html/rhodo_homepage.html. The P. pantotrophus sequence data are from references 13, 53, and 54, while the A. aeolicus sequence is from reference 9.