| Domain | Name | Category | Type |
| IPR001273 | Aromatic amino acid hydroxylase | Family | Family |
| IPR002912 | ACT domain | Domain | Domain |
| IPR005961 | Phenylalanine-4-hydroxylase, tetrameric form | Family | Family |
| IPR018301 | Aromatic amino acid hydroxylase, iron/copper binding site | Site | Binding site |
| IPR019773 | Tyrosine 3-monooxygenase-like | Family | Family |
| IPR019774 | Aromatic amino acid hydroxylase, C-terminal | Domain | Domain |
| IPR036329 | Aromatic amino acid monoxygenase, C-terminal domain superfamily | Family | Homologous superfamily |
| IPR036951 | Aromatic amino acid hydroxylase superfamily | Family | Homologous superfamily |
| IPR041912 | Eukaryotic phenylalanine-4-hydroxylase, catalytic domain | Domain | Domain |