Whole Genome Sequencing to Investigate the Emergence of Clonal Complex 23 Neisseria meningitidis Serogroup Y Disease in the United States
Figure 3
Histograms showing πN (number of non-synonymous substitutions per non-synonymous site) and πS (number of synonymous substitutions per synonymous site) in early strain type and late strain type genomes.
πN and πS calculated using codeml from the PAML package.