| IPR007066 | RNA polymerase Rpb1, domain 3 | Domain |
| IPR007081 | RNA polymerase Rpb1, domain 5 | Domain |
| IPR045867 | DNA-directed RNA polymerase, subunit beta-prime | Family |
| IPR012754 | DNA-directed RNA polymerase, subunit beta-prime, bacterial type | Family |
| IPR042102 | RNA polymerase Rpb1, domain 3 superfamily | Homologous Superfamily |
| IPR007083 | RNA polymerase Rpb1, domain 4 | Domain |
| IPR000722 | RNA polymerase, alpha subunit | Domain |
| IPR044893 | RNA polymerase Rpb1, clamp domain superfamily | Homologous Superfamily |
| IPR038120 | RNA polymerase Rpb1, funnel domain superfamily | Homologous Superfamily |
| IPR006592 | RNA polymerase, N-terminal | Domain |
| IPR007080 | RNA polymerase Rpb1, domain 1 | Domain |
| IPR011773 | DNA-directed RNA polymerase, alpha subunit | Family |
| IPR011262 | DNA-directed RNA polymerase, insert domain | Domain |
| IPR011260 | RNA polymerase, alpha subunit, C-terminal | Domain |
| IPR011263 | DNA-directed RNA polymerase, RpoA/D/Rpb3-type | Domain |
| IPR036643 | DNA-directed RNA polymerase, insert domain superfamily | Homologous Superfamily |
| IPR036603 | RNA polymerase, RBP11-like subunit | Homologous Superfamily |