FIGURE 2.

Evolutionary relationships of intact Tas1r genes in amphibians. The phylogenetic tree was constructed using the ML method. Phylogeny was rooted with the vomeronasal 2 receptor 26 gene (V2R26) of two fish species Gasterosteus aculeatus (NCBI accession no. XM_040193080.1) and Simochromis diagramma (NCBI accession no. XM_040009575.1). This is because V2R genes are relatively close to Tas1r genes among GPCRs. The numbers at the branches indicate the percentage of posterior probability values