Figure 2

Correlation between the total protein numbers and the numbers of PDC/PAS proteins across 48 bacterial genomes. The correlation is significant either based on all 48 genomes or based on only 43 genomes (excluding 5 over-representing Staphylococcus genomes): for 48 genomes, Pearson’s correlation coefficient r = 0.77 (p < 0.0001) and Spearman’s rank correlation ρ = 0.83 (p < 0.0001); for 43 genomes, Pearson’s correlation coefficient r = 0.76 (p < 0.0001) and Spearman’s rank correlation ρ = 0.82 (p < 0.0001). Bacterial species were classified as motile or non-motile (see Table 1), and they were plotted with open and closed circles, respectively.