Figure 2. Schematic presentation of genes encoding HmuY homologs.
P. gingivalis HmuY and its homologs in T. forsythia (Tfo), Bacteroides fragilis and Bacteroides vulgatus (shown in red) and other genes identified in the P. gingivalis hmu and hmu-like operons (shown in gray) are shown. The gene marked in black does not exhibit homology to the gene encoding PGA7_RS02040 (putative ATPase) in P. gingivalis. Genes marked with open arrows do not exist in all bacteria presented here. The gene marked in gray diagonal stripes encodes a TonB-dependent outer-membrane receptor, which is less homologous to P. gingivalis HmuR.
