Figure 5

The region of the operon of omcB (dark blue) in all six Geobacter species genomes. In G. sulfurreducens the multi-heme cytochrome OmcB, which is required for electron transport to extracellular acceptors, is encoded in an operon with two other genes, orf1 (red) and orf2(gray) that is duplicated in the genome [54]. Shown here are regions of the genomes that encode the orthologs to these genes in all six Geobacter genomes, with orthologs colored identically. In some cases, there were multi-heme cytochromes encoded in the position of OmcB, but the sequence similarity was too low to confidently predict orthology, so these genes are colored light blue.