Figure 1.

Multiple homologues of the shared subunits RPB5 and RPB6 occur in a broad range of eukaryotes. (A) Bayesian maximum likelihood tree of RPB5 sequences. (B) Bayesian maximum likelihood tree of RPB6 sequences. Instances where multiple paralogues exist are indicated by shaded boxes, GenBank accession numbers are shown with taxon names. Accession numbers for Cyanidioschyzon merolae, Chlamydomonas reinhardtii, and Paramecium tetraurelia proteins are specific for their genome project databases (Matsuzaki et al., 2004, http://www.jgi.doe.gov/ and Arnaiz et al., 2007, respectively). Bootstrap support for the Bayesian topology from maximum likelihood (ML), maximum parsimony (MP), and neighbor-joining (NJ) approaches is indicated next to nodes. Bar, 0.1 changes.