Figure 6.

Phylogenetic tree of the ATM/HMT subfamily of ABC transporters. The tree is the most parsimonious tree (3,950 steps) for which branch lengths were estimated by maximum likelihood (ML) using the VT model of amino acid substitution (log L = −20,342.67). Quartet puzzling support values above 50% from an independent ML reconstruction (1,000 puzzling steps) are printed in bold type and bootstrap percentages above 50% from an independent distance reconstruction (1,000 replicates) are printed in italic type (see Supplemental Fig. 1 for methodological details). Protein accession numbers from organisms other than C. reinhardtii and C. merolae are given in Supplemental Table I. CrCds1 (AAQ19847) has been named previously by Hanikenne et al. (2005).