| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P38865 | Copper transport protein CTR2; Copper transporter 2; | CTR2; YHR175W; | NP_012045.3; | 189 | yeast |
| Q06686 | Copper transport protein CTR3; Copper transporter 3; | CTR3; YLR411W; | NP_013515.3; | 241 | yeast |
| P25355 | Copper transport protein 86; | CTR86; YCR054C; | NP_009983.1; | 563 | yeast |
| P89105 | RNA polymerase-associated protein CTR9; Centromere-binding factor 1-dependent protein 1; Cln three-requiring protein 9; | CTR9; CDP1; YOL145C; | NP_014496.2; | 1077 | yeast |
| P53088 | Cytoplasmic tRNA 2-thiolation protein 1; EC 2.7.7.-; Cytoplasmic tRNA adenylyltransferase 1; Needs CLA4 to survive protein 6; Thiolation of uridine in cytoplasmic tRNA protein 1; | NCS6; CTU1 TUC1; YGL211W; | NP_011304.2; | 359 | yeast |
| P53923 | Cytoplasmic tRNA 2-thiolation protein 2; Needs CLA4 to survive protein 2; Thiolation of uridine in cytoplasmic tRNA protein 2; | NCS2; CTU2 TUC2; YNL119W; | NP_014280.3; | 493 | yeast |
| P38428 | Coupling of ubiquitin conjugation to ER degradation protein 1; Kinetochore-defect suppressor 4; | CUE1; KIS4; YMR264W; | NP_013991.1; | 203 | yeast |
| P36075 | Ubiquitin-binding protein CUE2; Coupling of ubiquitin conjugation to ER degradation protein 2; | CUE2; YKL090W; | NP_012833.1; | 443 | yeast |
| P53137 | CUE domain-containing protein 3; Coupling of ubiquitin conjugation to ER degradation protein 3; | CUE3; YGL110C; | NP_011405.1; | 624 | yeast |
| Q04201 | CUE domain-containing protein CUE4; Coupling of ubiquitin conjugation to ER degradation protein 4; | CUE4; YML101C; | NP_013607.1; | 117 | yeast |
| Q08412 | Ubiquitin-binding protein CUE5; Coupling of ubiquitin conjugation to ER degradation protein 5; | CUE5; YOR042W; | NP_014685.1; | 411 | yeast |
| P53202 | Cullin-3; Cullin-B; | CUL3; YGR003W; | NP_011517.1; | 744 | yeast |
| P47050 | Cullin-8; Cullin-C; Regulator of Ty1 transposition protein 101; | RTT101; CUL8; YJL047C; | NP_012488.3; | 842 | yeast |
| P15315 | Transcriptional activator protein CUP2; Copper-fist transcription factor; | CUP2; ACE1; YGL166W; | NP_011349.3; | 225 | yeast |
| P41817 | Homeobox protein CUP9; | CUP9; YPL177C; | NP_015148.1; | 306 | yeast |
| Q06469 | Curing of [URE3] protein 1; | CUR1; YPR158W; | NP_015484.1; | 252 | yeast |
| Q02554 | Cold sensitive U2 snRNA suppressor 1; | CUS1; YMR240C; | NP_013967.1; | 436 | yeast |
| P53830 | Cold sensitive U2 snRNA suppressor 2; | CUS2; YNL286W; | NP_014113.1; | 285 | yeast |
| P53899 | CDC48-associated ubiquitin-like/zinc finger protein 1; CDC48-associated UBL/Zn-finger protein 1; | CUZ1; YNL155W; | NP_014244.1; | 274 | yeast |
| Q03772 | Pre-mRNA-splicing factor CWC15; Complexed with CEF1 protein 15; | CWC15; YDR163W; | NP_010447.3; | 175 | yeast |
