Table 2. Solitary genes in four mammalian species.
| Species | Gene | MDAS |
|---|---|---|
| Mus musculus | Olfr19 (M12) | 2.6 |
| Olfr49 | 1.7 | |
| Olfr266 | 9.4 | |
| Olfr267 | 5.8 | |
| Olfr370 | 1.6 | |
| Olfr371 | 1.6 | |
| Olfr466 | 43.4 | |
| Olfr1402 | 9.4 | |
| Rattus norvegicus | Olr1 | 1.5 |
| Olr390 | 6.5 | |
| Olr392 | 6.5 | |
| Olr799 | 2.0 | |
| Olr854 | 4.4 | |
| Olr1096 | 2.0 | |
| Olr1646 | 3.1 | |
| Olr1666 | 1.6 | |
| Olr1667 | 1.6 | |
| Olr1768 | 10.0 | |
| Cavia porcellus | OR1I1 | Alone in genomic scaffold |
| OR1M1 | Alone in genomic scaffold | |
| OR1N1 | Alone in genomic scaffold | |
| OR2AT4 | 3.5 | |
| OR2C1 | Alone in genomic scaffold | |
| OR2K2 | Alone in genomic scaffold | |
| OR2T11 | 1.0 | |
| OR2Y1 | Alone in genomic scaffold | |
| OR2Z1 | Alone in genomic scaffold | |
| OR4B1 | Alone in genomic scaffold | |
| OR4C5 | 1.1 | |
| OR4C6 | 1.3 | |
| OR4C11 | Alone in genomic scaffold | |
| OR4C12 | Alone in genomic scaffold | |
| OR4D1 | Alone in genomic scaffold | |
| OR4X2 | Alone in genomic scaffold | |
| OR5AS1 | Alone in genomic scaffold | |
| OR5D16 | Alone in genomic scaffold | |
| OR5I1 | 1.4 | |
| OR5K4 | Alone in genomic scaffold | |
| OR8B8 | 1.0 | |
| OR10AG1 | Alone in genomic scaffold | |
| OR13A1 | Alone in genomic scaffold | |
| OR51G11 | 3.6 | |
| OR52B2 | 1.7 | |
| Homo sapiens | OR2A4 | 38.9 |
| OR2AE1 | 38.9 | |
| OR2K2 | 6.6 | |
| OR4F17 | 8.7 | |
| OR4F21 | 6.9 | |
| OR11H1 | Alone in chromosome 22 |
Intact (according to Ensembl Biomart) solitary genes. MDAS: maximum distance as solitary (measured in Mb), the genomic interval in which the odorant receptor gene is isolated, both upstream and downstream in respect to its transcript coordinates, from neighboring odorant receptor genes. For Cavia porcellus, the average genomic scaffold length is 8.9 Mb. Most isolated genes in each species analyzed have gene names highlighted in bold.