| Domain | Name | Category | Type | 
		| IPR001075 | NIF system FeS cluster assembly, NifU, C-terminal | Domain | Domain | 
		| IPR014824 | Scaffold protein Nfu/NifU, N-terminal | Domain | Domain | 
		| IPR034904 | Fe-S cluster assembly domain superfamily | Family | Homologous superfamily | 
		| IPR036498 | Scaffold protein Nfu/NifU, N-terminal domain superfamily | Family | Homologous superfamily |