| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q1RMX2 | Ubiquitin-conjugating enzyme E2 D2; EC 6.3.2.19; Ubiquitin carrier protein D2; Ubiquitin-protein ligase D2; | UBE2D2; UBC4 UBCH4 UBCH5B; | NP_001039961.1; | 147 | cow |
| Q3ZCF7 | Ubiquitin-conjugating enzyme E2 D3; EC 6.3.2.19; Ubiquitin carrier protein D3; Ubiquitin-protein ligase D3; | UBE2D3; | NP_001068603.1; | 147 | cow |
| Q2T9X7 | Ubiquitin-conjugating enzyme E2 E3; EC 6.3.2.19; Ubiquitin carrier protein E3; Ubiquitin-protein ligase E3; | UBE2E3; | NP_001073251.1; | 207 | cow |
| Q17QG5 | Ubiquitin-conjugating enzyme E2 G2; EC 6.3.2.19; Ubiquitin carrier protein G2; Ubiquitin-protein ligase G2; | UBE2G2; | NP_001069796.1; | 165 | cow |
| Q2TA03 | Ubiquitin-conjugating enzyme E2 J2; EC 6.3.2.19; | UBE2J2; | NP_001033132.1; | 259 | cow |
| Q3MHP1 | Ubiquitin-conjugating enzyme E2 L3; EC 6.3.2.19; Ubiquitin carrier protein L3; Ubiquitin-protein ligase L3; | UBE2L3; | NP_001071562.1; | 154 | cow |
| A5PJC4 | Ubiquitin/ISG15-conjugating enzyme E2 L6; EC 6.3.2.19; Ubiquitin carrier protein L6; Ubiquitin-protein ligase L6; | UBE2L6; | NP_001092387.1; | 153 | cow |
| Q32L27 | Ubiquitin-conjugating enzyme E2 Q2; EC 6.3.2.19; Ubiquitin carrier protein Q2; Ubiquitin-protein ligase Q2; | UBE2Q2; | NP_001068998.1; | 342 | cow |
| Q3SZ52 | Ubiquitin-conjugating enzyme E2 variant 1; UEV-1; | UBE2V1; | NP_001030574.1; | 147 | cow |
| Q3SZ43 | Ubiquitin-conjugating enzyme E2 variant 2; | UBE2V2; UEV2; | NP_001029214.1; | 145 | cow |
| A3KMV5 | Ubiquitin-like modifier-activating enzyme 1; Ubiquitin-activating enzyme E1; | UBA1; UBE1; | NP_001095947.1;XP_005228124.1;XP_005228125.1;XP_005228126.1; | 1058 | cow |
| A7MAZ3 | Ubiquitin-like modifier-activating enzyme 5; Ubiquitin-activating enzyme 5; UFM1-activating enzyme; Ubiquitin-activating enzyme E1 domain-containing protein 1; | UBA5; UBE1DC1; | NP_001094537.1; | 404 | cow |
| P0CG53 | Polyubiquitin-B; [Cleaved into: Ubiquitin]; | UBB; | NP_776558.1;XP_005220351.1;XP_005220352.1; | 305 | cow |
| A3KN22 | NEDD8-conjugating enzyme Ubc12; EC 6.3.2.-; NEDD8 carrier protein; NEDD8 protein ligase; Ubiquitin-conjugating enzyme E2 M; | UBE2M; UBC12; | NP_001076972.1; | 183 | cow |
| Q2KJD7 | Ubiquitin-like domain-containing CTD phosphatase 1; EC 3.1.3.16; Nuclear proteasome inhibitor UBLCP1; | UBLCP1; | NP_001039459.1; | 318 | cow |
| P0CH28 | Polyubiquitin-C; [Cleaved into: Ubiquitin-related; Ubiquitin]; | UBC; | NP_001193236.1; | 690 | cow |
| Q32P99 | Ubiquitin-conjugating enzyme E2 B; EC 6.3.2.19; Ubiquitin carrier protein B; Ubiquitin-protein ligase B; | UBE2B; | NP_001032536.1; | 152 | cow |
| Q32PA5 | Ubiquitin-conjugating enzyme E2 C; EC 6.3.2.19; Ubiquitin carrier protein C; Ubiquitin-protein ligase C; | UBE2C; UBCH10; | NP_001032526.1; | 179 | cow |
| Q1RMW1 | NEDD8-conjugating enzyme UBE2F; EC 6.3.2.-; NEDD8 carrier protein UBE2F; NEDD8 protein ligase UBE2F; NEDD8-conjugating enzyme 2; Ubiquitin-conjugating enzyme E2 F; | UBE2F; | NP_001069911.1; | 185 | cow |
| Q32LN1 | Ubiquitin-conjugating enzyme E2 H; EC 6.3.2.19; Ubiquitin carrier protein H; Ubiquitin-protein ligase H; | UBE2H; | NP_001032703.1; | 183 | cow |
