Figure 1.

The ME tree for pyruvate dehydrogenase, E1 component, alpha subunit, based on nucleotide sequences. Taxa in brown text are eukaryotes, and taxa in blue text are bacteria. Taxa with blue background are α-proteobacteria. Taxa with green background are green plants. The bootstrap values found at nodes represent values calculated with each of three criteria: ME, parsimony, and ML, respectively. See Materials and Methods for additional details. Accession numbers, alignments, and tree files are found in supporting information.