Table 2.
Transport function of orphan transporters of the SLC6 family
| Solute carrier | Name | Alias | Substrates (References) |
|---|---|---|---|
| SLC6A15 | B0AT2 | V7‐3, NTT7‐3, SBAT1 | Leu, Ile, Val, Met, Pro ( 62, 63) |
| SLC6A16 | NTT5 | Unknown | |
| SLC6A17 | B0AT3 | NTT4, RXT1 | Ala, Pro, Gly, Leu ( 64) |
| Leu, Met, Pro, Cys, Ala, Gln, Ser, His, Gly ( 65) | |||
| SLC6A18 | XT2, | XTRP2, ROSIT | Ala, Gly > other neutral AA |
| SLC6A19 | B0AT1 | Similar to XT2 | All neutral ( 34, 35) |
| SLC6A20 | IMINO | SIT1, XT3 | Pro, OH‐Pro ( 66, 67) |