Fig. 4

Bayesian phylogeny of the Alg13/catalytic MurG domain. a Schematic phylogenetic tree including the bacterial MurG homologues (see Additional file 3 for details). b Specific phylogeny excluding the bacterial MurG clade. The tree is unrooted and was reconstructed using 132 representative sequences and 116 conserved sites. Multifurcations correspond to branches with Bayesian posterior probabilities <0.5. Numbers at nodes indicate Bayesian posterior probabilities higher than 0.5. Bootstrap values from maximum likelihood analyses are reported on basal and major nodes. Colors on leaves represent the affiliation of sequences to a domain of life: archaea (blue), bacteria (orange) and eukaryotes (purple)