Fig 5. Phylogenetically related genes often have similar patterns of expression.

All trees in this figure were created from S4 Data, which is shown in S15 Fig. Branch lengths represent phylogenetic distance, with scale shown below each subtree. Coloring represents different species. Icons represent tissue expression as shown in legend. (A) Root of tree highlighting relationship between axolotl TAS2R42 and TAS2R43. Triangle represents the collapse of the rest of the tree. (B) Subset of tree showing single chicken receptor clustering with amphibian receptors. (C) Subset of tree showing a rare example of orthology between all five batrachian species. (D) Subset of tree showing bullfrog-specific radiation with intestinal and liver expression. (E) Subset of tree showing clade containing bullfrog, cane, and dart receptors expressed in the tongue and brain (among others).