| Nomenclature | Alanine/serine/cysteine transporter 1 | Alanine/serine/cysteine transporter 2 |
| Systematic nomenclature | SLC1A4 | SLC1A5 |
| Common abbreviation | ASCT1 | ASCT2 |
| HGNC, UniProt | SLC1A4, P43007 | SLC1A5, Q15758 |
| Endogenous substrates | L-cysteine > L-alanine = L-serine > L-threonine | L-alanine = L-serine = L-cysteine (low Vmax) = L-threonine = L-glutamine = L-asparagine >> L-methionine ≅ glycine ≅ L-leucine > L-valine > L-glutamic acid (enhanced at low pH) |
| Inhibitors (pIC50) | – | benzylcysteine 58, benzylserine 58, p-nitrophenyl glutamyl anilide 49 |
| Stoichiometry | 1 Na+: 1 amino acid (in): 1 Na+: 1 amino acid (out); (homo-, or hetero-exchange; 95) | 1 Na+: 1 amino acid (in): 1 Na+: 1 amino acid (out); (homo-, or hetero-exchange; 39) |
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