Fig. 4.

Evidence of positive selection in ten Mycobacterium tuberculosis genes across 10,209 genomes. Genes are ordered by the mean $\mathrm{Pr}(\omega >1)$ across codons, from highest (gidB) to lowest (gyrA). Point estimates (black points) and 95% credibility intervals (gray bars) for ω are shown across codons. Codons for which $\mathrm{Pr}(\omega >1)\ge 0.9$ are highlighted with yellow boxes. Stacked points indicate the number of alleles that are nonsynonymous (orange) or synonymous (green) relative to the commonest allele.