| Domain | Name | Category | Type |
| IPR001949 | NADH:ubiquinone oxidoreductase, 51kDa subunit, conserved site | Site | Conserved site |
| IPR011537 | NADH ubiquinone oxidoreductase, F subunit | Family | Family |
| IPR011538 | NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain | Domain | Domain |
| IPR019554 | Soluble ligand binding domain | Domain | Domain |
| IPR019575 | NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain | Domain | Domain |
| IPR037207 | NADH-ubiquinone oxidoreductase 51kDa subunit, iron-sulphur binding domain superfamily | Family | Homologous superfamily |
| IPR037225 | NADH-ubiquinone oxidoreductase 51kDa subunit, FMN-binding domain superfamily | Family | Homologous superfamily |