| AgNOR | argyrophilic nucleolar organizing region |
| DUB | Deubiquitinase |
| CDK | cyclin-dependent kinase |
| ETS | external transcribed spacer |
| ITS | internal transcribed spacer |
| IGS | intergenic spacer |
| NMP | nucleoside monophosphate |
| NOR | nucleolar organizing region |
| NoRC | nucleolar chromatin remodeling complex |
| NTP | nucleoside triphosphate |
| PIC | preinitiation complex |
| Pol | RNA polymerase |
| rDNA | ribosomal DNA |
| rRNA | ribosomal RNA |
| SL-1 | Selectivity factor-1 |
| TOP | Topoisomerase |
| UCE | upstream control element |
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