| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| U3ISS1 | Uncharacterized protein; | CMIP; | NULL | 724 | mallard |
| U3ISE3 | Uncharacterized protein; Fragment; | NULL | NULL | 155 | mallard |
| U3ITM9 | Uncharacterized protein; Fragment; | GGH; | NULL | 328 | mallard |
| U3IIA8 | Uncharacterized protein; Fragment; | MEIS2; | NULL | 395 | mallard |
| U3IWS2 | Claudin; Fragment; | CLDN23; | NULL | 227 | mallard |
| U3II39 | Uncharacterized protein; Fragment; | TCF12; | NULL | 373 | mallard |
| U3IWR1 | Uncharacterized protein; Fragment; | C6orf211; | NULL | 440 | mallard |
| U3IJA3 | Ubiquitin carboxyl-terminal hydrolase; EC 3.4.19.12; Fragment; | USP19; | NULL | 1389 | mallard |
| U3IX87 | Uncharacterized protein; Fragment; | FAM134A; | NULL | 444 | mallard |
| U3IX11 | Uncharacterized protein; Fragment; | PROC; | NULL | 260 | mallard |
| U3IW50 | Uncharacterized protein; | CDHR1; | NULL | 869 | mallard |
| U3J4H1 | Uncharacterized protein; Fragment; | COL23A1; | NULL | 522 | mallard |
| U3IZX9 | Uncharacterized protein; Fragment; | PSMA7; | NULL | 216 | mallard |
| U3IZ80 | Uncharacterized protein; | PPP1R1C; | NULL | 47 | mallard |
| U3J3U3 | Uncharacterized protein; | LOC101794401; | NULL | 139 | mallard |
| U3J761 | Uncharacterized protein; Fragment; | ZNF131; | NULL | 231 | mallard |
| U3IL05 | Uncharacterized protein; Fragment; | LOC101798236; | NULL | 291 | mallard |
| U3I470 | Uncharacterized protein; Fragment; | NULL | NULL | 79 | mallard |
| U3J774 | Uncharacterized protein; Fragment; | RBFA; | NULL | 328 | mallard |
| U3HYV8 | Uncharacterized protein; Fragment; | NULL | NULL | 43 | mallard |
