| Nomenclature | Mitochondrial ornithine transporter 1 | Mitochondrial ornithine transporter 2 | Carnitine/acylcarnitine carrier |
| Systematic nomenclature | SLC25A15 | SLC25A2 | SLC25A20 |
| Common abbreviation | ORC1 | ORC2 | CAC |
| HGNC, UniProt | SLC25A15, Q9Y619 | SLC25A2, Q9BXI2 | SLC25A20, O43772 |
| Substrates | L-arginine 311, L-citrulline 311, L-lysine 311, L-ornithine 311 | L-arginine 311, L-citrulline 311, L-lysine 311, L-ornithine 311, L-histidine 311, D-histidine 311, D-arginine 311, D-lysine 311, D-ornithine 311, D-citrulline 311 | – |
| Stoichiometry | 1 Ornithine (in) :1 citrulline: 1 H+ (out) | 1 Ornithine (in) :1 citrulline: 1 H+ (out) | – |
| Comment | – | – | Exchanges cytosolic acylcarnitine for mitochondrial carnitine |
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