Dot plot for the analyzed orthologous genes in the (a) ECO-KPN; and (b) STM-KPN comparison. The Y and X axis represents, respectively, the chromosomal positions of the KPN genes (in base pair) and those of the orthologous genes in ECO (left panel) or STM (right panel). The black and red dots represent SOGs and COGs, respectively. Most of the COGs are located close to Ter. The positions of Ter are 1,892,000, 1,549,000 and 1,635,000 bp for KPN, ECO and STM, respectively.