| GC | Gastric Cancer |
| UPS | Ubiquitin Proteasome System |
| DUB | Deubiquitinating Enzyme |
| CIP2A | Cancerous Inhibitor of Protein Phosphatase |
| PP2A | Protein Phosphatase 2A |
| BAP1 | BRCA1-associated protein 1 |
| E2F1 | E2F transcription factor 1 |
| UCHL1 | Ubiquitin C-terminal Hydrolase L1 |