Fig 2.
Pairwise comparison of the gene contents of hitherto-sequenced C. diphtheriae strains. Similarities denote the number of genes shared by a particular pair of strains, differences display the number of genes not shared within a pair of strains, and pair-uniques correspond to orthologous genes shared only by a distinct strain pair. All calculations were carried out with the software tool EDGAR. The highest and lowest values of each category are listed and specifically marked.