Figure 2

Gene loss in B. vafer and B. floridanus compared to B. pennsylvanicus. (a) B. vafer genes were plotted against orthologs in B. pennsylvanicus. The x- and y-axes correspond to gene number in B. vafer and B. pennsylvanicus, respectively. Locations of missing genes (represented by a delta symbol) and eroded genes (represented by a psi symbol) are emphasized by larger dots. Gene names are listed next to the symbols. Two genes, marked with asterisks, are missing in one of the genomes and present only as a pseudogene in the other genome. The inset shows a more detailed view of the ~30 kb region in B. vafer near the putative replication origin, in which eight genes are missing compared to B. pennsylvanicus. The grey shaded region in the inset indicates the relocation of the origin in B. vafer compared to B. pennsylvanicus. (b) B. floridanus genes were plotted against orthologs in B. pennsylvanicus, using the same methodology as above.