| IPR007081 | RNA polymerase Rpb1, domain 5 | Domain |
| IPR045867 | DNA-directed RNA polymerase, subunit beta-prime | Family |
| IPR007075 | RNA polymerase Rpb1, domain 6 | Domain |
| IPR000684 | RNA polymerase II, heptapeptide repeat, eukaryotic | Repeat |
| IPR007083 | RNA polymerase Rpb1, domain 4 | Domain |
| IPR044893 | RNA polymerase Rpb1, clamp domain superfamily | Homologous Superfamily |
| IPR006592 | RNA polymerase, N-terminal | Domain |
| IPR007066 | RNA polymerase Rpb1, domain 3 | Domain |
| IPR007073 | RNA polymerase Rpb1, domain 7 | Domain |
| IPR042102 | RNA polymerase Rpb1, domain 3 superfamily | Homologous Superfamily |
| IPR038593 | RNA polymerase Rpb1, domain 7 superfamily | Homologous Superfamily |
| IPR000722 | RNA polymerase, alpha subunit | Domain |
| IPR038120 | RNA polymerase Rpb1, funnel domain superfamily | Homologous Superfamily |
| IPR007080 | RNA polymerase Rpb1, domain 1 | Domain |
| IPR028363 | DNA-directed RNA polymerase, subunit RPB6 | Family |
| IPR006111 | Archaeal Rpo6/eukaryotic RPB6 RNA polymerase subunit | Family |
| IPR020708 | DNA-directed RNA polymerase, 14-18kDa subunit, conserved site | Conserved Site |
| IPR006110 | RNA polymerase, subunit omega/Rpo6/RPB6 | Family |
| IPR036161 | RPB6/omega subunit-like superfamily | Homologous Superfamily |