Dendrogram of FeoB from various organisms, based on protein sequence alignment. Alignment and dendrogram were built using CLC Sequence Viewer software (CLC Bio, Denmark). The bootstrap analysis algorithm was used, with 100 replicates. Bootstrap values are indicated at each knots and substitution rate at the bottom. Sequences were retrieved from the Integrated Microbial Genomes of the DOE Joint Genome Institute (http://img.jgi.doe.gov/cgi-bin/w/main.cgi). Ecoli: Escherichia coli DH1, Legpneu: Legionella pneumophila Paris, Methaja: Methanocaldococcus jannaschii DSM 2661, Porgin: Porphyromonas gingivalis ATCC 33227, Rcap: Rhodobacter capsulatus SB1003, Rsph: Rhodobacter sphaeroides 2.4.1, Rfer: Rhodobacter ferroxidans SW2, Staphepi: Staphylococcus epidermidis ATCC 12228, Syn: Synechocystis sp. PCC 6803. Accession numbers: Ecoli FeoB, BAJ45144; Legpneu FeoB, YP_125016; Methaja FeoB, NP_247545; Porgin FeoB1, YP_001929201; Porgin FeoB2, YP_001929425; Rcaps FeoB, YP_003576264; Rcaps Feo2B, YP_003578180; Rsph FeoB, ; YP_351866 Rsw2 FeoB, ZP_05845183; Staphepi FeoB1, NP_763744; Staphepi FeoB2, NP_765669; Syn FeoB, NP_440528.