Distribution of dN vs dS of SNPs pairs of two S. epidermidis strains. The distribution of dN vs dS mutations was represented according to the p-value calculated from the One-tail Z (or t∞) test. Figure 1A represents the numbers of SNPs pairs falling into the different confidence level classes. Figure 1B shows the cumulative probability of all SNPs pairs. Figure 1C plots the distribution of dN/dS of all SNPs pairs. All plots are color-coded according to different intervals: red for [0, 0.05), orange for [0.05, 0.1), green for (0.9, 0.95], blue for (0.95, 1], pink for others.