Phylogenetic relationships of caveolin sequences inferred from an unrooted Bayesian tree. An unrooted Bayesian tree inferred from the alignment used for the tree in Fig. S1. No columns were removed from the alignment using GUIDANCE. Posterior probabilities are shown next to their respective nodes. Sequences are colored in the same manner as in Fig. S1. The asterisk, *, indicates a caveolin-related protein from S. rosetta.