| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q9XW78 | UPF0528 protein Y75B8A.31; | NULL | NP_499604.1; | 313 | c.elegen |
| Q8MNU8 | UPF0562 protein C29E4.12; | NULL | NP_741234.1; | 108 | c.elegen |
| Q9BI88 | UPF0587 protein F46B6.12; | NULL | NP_505521.2; | 167 | c.elegen |
| Q564X7 | UPF0598 protein F59C6.12; | NULL | NP_001021522.1; | 173 | c.elegen |
| O01323 | UPF0729 protein F18A11.3; | NULL | NP_496772.1; | 84 | c.elegen |
| Q18493 | Probable UDP-N-acetylglucosamine pyrophosphorylase; EC 2.7.7.23; | NULL | NP_497777.1; | 484 | c.elegen |
| Q19360 | NEDD8-activating enzyme E1 catalytic subunit; EC 6.3.2.-; Ectopic membrane ruffles in embryo protein 1; Ubiquitin-activating enzyme 3 homolog; | uba-3; rfl-1; | NP_498534.2; | 430 | c.elegen |
| P91430 | Ubiquitin-like modifier-activating enzyme 5; Ubiquitin-activating enzyme 5; | uba-5; | NP_491248.1; | 419 | c.elegen |
| Q9XVK5 | NEDD8-conjugating enzyme ubc-12; EC 6.3.2.-; NEDD8 carrier protein; NEDD8 protein ligase; Ubiquitin-conjugating enzyme E2 12; | ubc-12; | NP_493024.1; | 180 | c.elegen |
| Q11076 | Probable ubiquitin-conjugating enzyme protein 17; | ubc-17; | NP_509188.3; | 728 | c.elegen |
| P52478 | Ubiquitin-conjugating enzyme E2 1; EC 6.3.2.19; Ubiquitin carrier protein 1; Ubiquitin-protein ligase 1; | ubc-1; | NP_500480.1; | 192 | c.elegen |
| P52484 | Probable ubiquitin-conjugating enzyme E2 21; EC 6.3.2.19; Ubiquitin carrier protein 21; Ubiquitin-protein ligase 21; | ubc-21; | NP_509502.3; | 214 | c.elegen |
| Q93571 | Ubiquitin-conjugating enzyme E2 25; EC 6.3.2.19; | ubc-25; | NP_492764.2; | 387 | c.elegen |
| P35129 | Ubiquitin-conjugating enzyme E2 2; EC 6.3.2.19; Lethal protein 70; Ubiquitin carrier protein 2; Ubiquitin-protein ligase 2; | let-70; ubc-2; | NP_502065.1; | 147 | c.elegen |
| P34477 | Probable ubiquitin-conjugating enzyme E2 7; EC 6.3.2.19; Ubiquitin carrier protein 7; Ubiquitin-protein ligase 7; | ubc-7; | NP_499133.1; | 164 | c.elegen |
| Q95017 | SUMO-conjugating enzyme UBC9; EC 6.3.2.-; SUMO-protein ligase; Ubiquitin carrier protein 9; Ubiquitin-conjugating enzyme E2 9; Ubiquitin-protein ligase 9; | ubc-9; | NP_001023158.1; | 166 | c.elegen |
| Q09349 | Probable ubiquitin conjugation factor E4; EC 6.3.2.-; | ufd-2; | NP_495692.1; | 980 | c.elegen |
| Q09444 | Probable ubiquitin carboxyl-terminal hydrolase ubh-4; EC 3.4.19.12; Ubiquitin C-terminal hydrolase family 1 member 4; Ubiquitin thioesterase 4; | ubh-4; | NP_495684.2; | 321 | c.elegen |
| P0CG71 | Polyubiquitin-A; [Cleaved into: Ubiquitin; Ubiquitin-related]; | ubq-1; ubia; | NP_741157.1; | 838 | c.elegen |
| P91302 | Ubiquitin-like protein 5; | ubl-5; | NP_491640.1; | 73 | c.elegen |
