Routed phylogenetic analysis of the MCT1-4 amino acid sequences. The putative MCT sequences of other species were obtained from the Ensembl database, as shown in Table 2. Consensus trees were generated using the Neighbor-joining method with the pairwise deletion gap calculating option. The results were confirmed by 10,000 bootstraps. Numbers indicate bootstrap values and the scale bar units are the number of amino acid substitutions per site.