Figure 2. Graphic view of a syntenic gene cluster that is conserved in five taxa of Bacteroidetes.
The genes encoding the components of TonB dependent transporters are ExbB, ExbD and TonB. Locus ID of each gene is given in the boxes, with taxon prefix (e.g. D505_ for E.a.) in the ExbB box for each species. The box with * in D. fermentans represents a predicted gene encoding a hypothetic protein. The scale bar represents 1 kb in length. Phylogenetically, E. anophelis and F. johnsoniae belong to the class Flavobacteria, Dyadobacter fermentans belongs to the class Cytophagia, Arcticibacter svalbardensis is in the class Sphingobacteriia, and Bacteroides thetaiotaomicron is located in the class Bacteroidia.