Functional Analyses of Bitter Taste Receptors in Domestic Cats (Felis catus)
Only the predicted intact Tas2r receptors are included. Sequences were either taken from Li and Zhang or obtained from reBLASTing genomes of these seven species. The tree was constructed by using the maximum-likelihood method based on the matrix-based model of  implemented in Mega 6 . The tree is drawn to scale, with branch lengths measured in the number of substitutions per site.