| GST | Glutathione S-transferase |
| KO | Knockout |
| KRAB | Krüppel-associated box |
| aKRAB | Ancestral KRAB |
| mKRAB | Modern KRAB |
| KZNF | KRAB zinc finger |
| PRDM | PR/SET Domain |
| SETDB1 | SET domain bifurcated histone lysine methyltransferase 1 |
| SSX | Synovial sarcoma X breakpoint |
| TRIM28 | Tripartite motif containing 28 |
| ZNF | C2H2 zinc finger |