| Domain | Name | Category | Type |
| IPR001222 | Zinc finger, TFIIS-type | Domain | Domain |
| IPR001529 | DNA-directed RNA polymerase, M/15kDa subunit | Domain | Domain |
| IPR012164 | DNA-directed RNA polymerase subunit/transcription factor S | Family | Family |
| IPR019761 | DNA-directed RNA polymerase M, 15kDa subunit, conserved site | Site | Conserved site |
| IPR034012 | Pol II subunit B9, C-terminal zinc ribbon | Domain | Domain |