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. 2011 Aug;193(16):4088–4094. doi: 10.1128/JB.05064-11

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Fig. 2. — Context of frcB in the B. japonicum genome and homologs of FrcB in other organisms. (A) The blr3555 (pyoR) and bll3557 (frcB) genes are in a cluster of iron- and Irr-regulated genes. (B) ClustalW alignment of the B. japonicum (Bj) FrcB sequence with the sequences of annotated cytochromes b561 from the cyanobacterium Synechocystis sp. strain PCC 6803 (S6803), and other proteobacterial species, namely, Burkholderia glumae (Bg), Shewanella odeidensis (So), Escherichia coli (Ec), Brucella abortus (Ba), Neisseria gonorrhoeae (Ng), Helicobacter pylori (Hp), and Desulfuromonas acetoxidans (Da). Conserved histidine residues are indicated by black stars. Gaps introduced to maximize alignment are indicated by dashes.