FIG. 7.

Phylogenetic tree of Fur and DtxR homologs. A. Phylogenetic analysis of Fur and DtxR metalloregulators. B. Phylogenetic analysis of the corresponding RecA proteins from the organisms used in panel A. Trees were generated using ClustalW 1.75 software as described in Materials and Methods. Phylograms with weighted branch lengths are shown. S. gordonii and R. equi RecA proteins are not included, as their sequences are incomplete or not available. Accession numbers for all proteins in panels A and B are listed in Materials and Methods.