Figure 4.

Neighbor-joining trees of genomes used to address deuterostome-arthropod divergence time. (A) The intersection of seven eukaryotic genomes, 380 panorthologs (132,190 amino acid positions, alpha = 1.38). (B) The intersection of four eukaryotic genomes, 753 panorthologs (287,000 amino acid positions, alpha = 1.46). All nodes are supported significantly (>95%) in bootstrap analyses of neighbor-joining and maximum likelihood.