Figure 5

Phylogenetic tree of lamprey taar-like genes. Phylogenetic tree of taar and taar-like genes, with all nodes collapsed (grey triangles) except lamprey taar-like genes (ancestral node denoted by grey circle). Gene set and tree construction are same as in Fig. 1. European river lamprey, Lampetra fluviatalis; Arctic lamprey, Lethenteron camtschaticum; Sea lamprey, Petromyzon marinus. Genes are indicated by colour code for the species as shown and the unique part of the gene name, e.g. 1a (red) denotes tarl1a of the arctic lamprey. Magenta, predicted ancestral genes. Note close arctic lamprey orthologs for all tarl genes from European river and sea lamprey. Black arrow, European river lamprey tarl7a, whose expression is shown in Fig. 4. Numbers indicate % branch support for basal nodes (cutoff 80%). Scale bar, number of amino acid substitutions per site.