FIG. 4.—

Maximum likelihood-based phylogenetic tree of nad proteins. This tree is based on the concatenated amino acid sequences of 9 NADH dehydrogenase genes present in all the stramenopiles. Numbers beside the internal nodes are the maximum likelihood bootstrap values from 500 resamplings obtained with Phyml and the Bayesian Markov chain Monte Carlo posterior probability values. Black circles indicate 100% bootstrap support and 1.0 posterior probability values. Support values over 50% are shown adjacent to the corresponding nodes. Values below 50% are omitted. The clade containing all the stramenopiles is shaded. The scale bar represents the number of amino acids substitutions per residue.