| Domain | Name | Category | Type | 
		| IPR000358 | Ribonucleotide reductase small subunit family | Family | Family | 
		| IPR009078 | Ferritin-like superfamily | Family | Homologous superfamily | 
		| IPR012348 | Ribonucleotide reductase-like | Family | Homologous superfamily | 
		| IPR030475 | Ribonucleotide reductase small subunit, acitve site | Site | Active site | 
		| IPR033909 | Ribonucleotide reductase small subunit | Family | Family |