Fig. 2

Bayesian phylogenetic analysis of Tgfβ-f and other TGF-β family members. Unrooted phylogenetic tree constructed by Bayesian analysis using MrBayes with four independent runs of one million generations, with trees sampled every 100 generations, 25 % of sampled values discarded as burn-in, and the mixed model mode. Botryllus Tgfβ-f is marked by an arrow. Families of TGF-β proteins are labeled and indicated by vertical lines. Nodes are labeled with posterior probabilities. The scale bar for branch lengths indicates expected substitutions per site