| IPR048892 | Nrd1/Seb1, domain 2 | Domain |
| IPR034894 | Nrd1/Seb1, RNA recognition motif | Domain |
| IPR008942 | ENTH/VHS | Homologous Superfamily |
| IPR000504 | RNA recognition motif domain | Domain |
| IPR012677 | Nucleotide-binding alpha-beta plait domain superfamily | Homologous Superfamily |
| IPR006569 | CID domain | Domain |
| IPR035979 | RNA-binding domain superfamily | Homologous Superfamily |
| 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 |