| Domain | Name | Category | Type |
| IPR002156 | Ribonuclease H domain | Domain | Domain |
| IPR009027 | Ribosomal protein L9/RNase H1, N-terminal | Family | Homologous superfamily |
| IPR011320 | Ribonuclease H1, N-terminal | Domain | Domain |
| IPR012337 | Ribonuclease H-like superfamily | Family | Homologous superfamily |
| IPR017067 | Ribonuclease H1, eukaryote | Family | Family |
| IPR036397 | Ribonuclease H superfamily | Family | Homologous superfamily |
| IPR037056 | Ribonuclease H1, N-terminal domain superfamily | Family | Homologous superfamily |