| Domain | Name | Category | Type |
| IPR006133 | DNA-directed DNA polymerase, family B, exonuclease domain | Domain | Domain |
| IPR006134 | DNA-directed DNA polymerase, family B, multifunctional domain | Domain | Domain |
| IPR006172 | DNA-directed DNA polymerase, family B | Family | Family |
| IPR012337 | Ribonuclease H-like superfamily | Family | Homologous superfamily |
| IPR015088 | Zinc finger, DNA-directed DNA polymerase, family B, alpha | Domain | Domain |
| IPR017964 | DNA-directed DNA polymerase, family B, conserved site | Site | Conserved site |
| IPR023211 | DNA polymerase, palm domain superfamily | Family | Homologous superfamily |
| IPR024647 | DNA polymerase alpha catalytic subunit, N-terminal domain | Domain | Domain |
| IPR036397 | Ribonuclease H superfamily | Family | Homologous superfamily |
| IPR038256 | DNA polymerase alpha, zinc finger domain superfamily | Family | Homologous superfamily |
| IPR042087 | DNA polymerase family B, thumb domain | Family | Homologous superfamily |
| IPR043502 | DNA/RNA polymerase superfamily | Family | Homologous superfamily |