| Domain | Name | Category | Type |
| IPR000572 | Oxidoreductase, molybdopterin-binding domain | Domain | Domain |
| IPR001199 | Cytochrome b5-like heme/steroid binding domain | Domain | Domain |
| IPR005066 | Moybdenum cofactor oxidoreductase, dimerisation | Domain | Domain |
| IPR008335 | Eukaryotic molybdopterin oxidoreductase | Family | Family |
| IPR014756 | Immunoglobulin E-set | Family | Homologous superfamily |
| IPR018506 | Cytochrome b5, heme-binding site | Site | Binding site |
| IPR022407 | Oxidoreductase, molybdopterin binding site | Site | Binding site |
| IPR036374 | Oxidoreductase, molybdopterin-binding domain superfamily | Family | Homologous superfamily |
| IPR036400 | Cytochrome b5-like heme/steroid binding domain superfamily | Family | Homologous superfamily |