Figure 3.

Concatenated phylogenetic analysis of MenFD (Bayesian analysis). Phylogenetic trees of the concatenated MenF and MenD proteins with Chlamydiales. The tree was inferred with phylobayes⁴⁶ under the CAT + GTR model⁴⁷. We used stringent criteria and considered convergence when maxdiff <0.1 were obtained based on sample trees (taking one from every 100 trees) after a minimum of at least 300 trees. We assessed the burn-in to be 320. The tree is midpoint rooted. The scale bar shows the inferred number of amino acid substitutions per site. The Chlamydiales are in purple, Rhodophyta are in red, Chloroplastida are green, algae bearing a plastid obtained by secondary or tertiary plastid endosymbiosis are brown, all other taxa are displayed in black. The tree shows a clear relationship between Cyanidiophytina and Chlamydiales with a posterior probability = 1. Note that MenD from Bacteriovorax is distantly related to the archaeplastidal sequences and only MenF shows this affiliation.