| IPR006620 | Prolyl 4-hydroxylase, alpha subunit | Domain |
| IPR023550 | PKHD-type hydroxylase | Family |
| IPR044862 | Prolyl 4-hydroxylase alpha subunit, Fe(2+) 2OG dioxygenase domain | Domain |
| IPR005123 | Oxoglutarate/iron-dependent dioxygenase domain | Domain |
| IPR041097 | PKHD-type hydroxylase C-terminal domain | Domain |