A phylogram of platyhelminth serpin homologs, Bayesian inference analysis. Values along the branches indicate posterior probabilities and bootstrap values resulting from Bayesian inference and Maximum likelihood analyses, respectively. Proportional lengths of the branches correspond to the expected number of amino acid substitutions per site. The resulting tree is mid-point rooted in order to visualise the clustering of representative subfamilies. Newly obtained Eudiplozoon nipponicum serpin homolog (EnSerp1) is labelled red.