| PKU | Phenylketonuria |
| HT1 | Hereditary tyrosinemia type 1 |
| PAH | Phenylalanine hydroxylase |
| FAH | Fumarylacetoacetate hydroxylase |
| BH4 | Tetrahydrobiopterin |
| PQC | Protein quality control |
| UPS | Ubiquitin proteasome system |
| HSP | Heat shock protein |
| DUBs | Deubiquitinating enzymes |
| ERAD | Endoplasmic reticulum-associated degradation |
| PROCTAC | Proteolysis-targeting chimaeras |
| NTBC | 2-[2-nitro-4-(trifluoromethyl)benzoyl]cyclohexane-1,3-dione |
| A-PAH | Activated PAH |
| RS-PAH | Resting state PAH |