Figure 1

Frequency distribution of orthologous groups in the eleven genomes examined. The grey bars represent orthologous groups, while the white bar represents strain-unique proteins. 1,882 of the 6,629 orthologous groups are found in each of the 11 genomes. Only 336 of the orthologous groups are found in individual genomes. In addition to the orthologous groups, the pangenome contains 5,584 proteins that occur only once in one of the genomes.