Fig. 6From: Inferring the number and position of changes in selective regime in a non-equilibrium mutation-selection frameworkIdentification of selective shifts on a phylogeny of \(\beta \)-lactamase proteins restricted to the Proteobacteria only. Coloured circles mark out the positions of inferred selective shifts. The black circle refers to the lineage shown to have undergone the greatest change in the original study [49] (ENCA = Common ancester of Enterobacteria)Back to article page