Table 2.
Number of T2R genes in each family.
| Families | Species | Chromosomal/Scaffold location | Number of genes |
| A | Human | Chr12 | 14(15) |
| Macaque | Chr11 | 14(16) | |
| Mouse | Chr6 | 23(23) | |
| Rat | Chr4 | 25(25) | |
| Cow | Chr5 | 10(11) | |
| Horse | Chr6 | 10(11) | |
| Dog | Chr27 | 6(7) | |
| Opossum | Chr2,chr8 | 9,6(17) | |
| C | Lizard | Scaffold_206,Scaffold_662 | 13,8(23) |
| B | Macaque | Chr3 | 4(4) |
| Mouse | Chr6 | 4(5) | |
| Rat | Chr4 | 4(5) | |
| Horse | Chr4 | 3(3) | |
| Opossum | Chr8 | 3(3) | |
| G | Frog | Scaffold_672 | 8(9) |
| F | Lizard | Scaffold_19 | 7(13) |
| D | Frog | Scaffold_672 | 10(18) |
Only the families that contained at least three genes in each species are counted.