Pairwise comparisons of orthologous content.

Comparing each genome to the other 11 genomes in our analysis, we calculated the number of shared and differing orthologs for each pair. The total number of differing orthologs equaled the sum of subtracting the number of shared orthologs from the total orthologs for each genome. We then determined the average shared and differing ortholog count along with standard deviations from the mean, 1754±38 and 499±67. The upper diagonal contains shared ortholog values while the lower diagonal shows differing ortholog values. Shared or differing ortholog counts that were two standard deviations from mean are highlighted in blue while those three standard deviations from the mean are in gold.