Figure 2

Molecular phylogenetic trees including the hagfish Dlx genes. The topologies and branch lengths were calculated with the neighbour-joining method. (A) Phylogenetic tree containing the Dlx1/4/6 and Dlx2/3/5 genes (based on 77 amino acid sites). (B) Phylogenetic tree of Dlx1/4/6 (based on 101 amino acid sites). (C) Phylogenetic tree of Dlx2/3/5 (based on 102 amino acid sites). Bootstrap probabilities (NJ and ML) greater than 50 and posterior probabilities (BI) greater than 0.5 are shown at each internal branch supported by all three methods, as the left, middle, and right numbers, respectively. The clades of the cyclostome Dlx genes are indicated with bold lines. The hagfish genes are shown in white bold letters in black boxes.