Figure 3
From: Phylogeny and adaptive evolution of the brain-development gene microcephalin (MCPH1) in cetaceans
Selection intensity estimates for species with complete MCPH1 sequences. Phylogenetic relationships are derived from [40, 41]. The ω estimates for individual branches according to the "free ratio model" are shown. ω values for the entire protein-coding region of MCPH1 are above branches, and ω values that were estimated after exclusion of exon 8 are shown below branches. Red branches mark lineages with ω > 1. The branch that terminates at the cetacean, Tursiops, was the only branch with ω > 1 for the whole MCPH1 gene and after removal of the highly variable exon 8 from analysis.