| Copper | Humans | Not Available | 1 | Details |
| Copper chaperone for superoxide dismutase | Humans | Delivers copper to copper zinc superoxide dismutase (SOD1) | 6 | Details |
| Copper transport protein ATOX1 | Humans | Multifunctional copper-sensing protein that operates both as a cytosolic copper chaperone and as a copper-dependent t... more | 4 | Details |
| Copper-containing nitrite reductase | Achromobacter cycloclastes | Not Available | 1 | Details |
| Copper-containing nitrite reductase | Alcaligenes xylosoxydans xylosoxydans | Not Available | 2 | Details |
| Copper-transporting ATPase 1 | Humans | ATP-driven copper (Cu(+)) ion pump that plays an important role in intracellular copper ion homeostasis. Within a cat... more | 5 | Details |
| Copper-transporting ATPase 2 | Humans | Copper ion transmembrane transporter involved in the export of copper out of the cells. It is involved in copper home... more | 5 | Details |
| Coproporphyrin III ferrochelatase | Bacillus subtilis (strain 168) | Involved in coproporphyrin-dependent heme b biosynthesis. Catalyzes the insertion of ferrous iron into coproporphyrin... more | 2 | Details |
| Coproporphyrinogen III oxidase | Bacillus subtilis (strain 168) | Involved in coproporphyrin-dependent heme b biosynthesis. Catalyzes the oxidation of coproporphyrinogen III to coprop... more | 1 | Details |
| Corneal esterases | Humans | Esterases in the cornea that metabolize drugs in the eye. | 1 | Details |
| Corrinoid adenosyltransferase MMAB | Humans | Converts cob(I)alamin to adenosylcobalamin (adenosylcob(III)alamin), a coenzyme for methylmalonyl-CoA mutase, therefo... more | 2 | Details |
| Corticosteroid-binding globulin | Humans | Major transport protein for glucocorticoids and progestins in the blood of almost all vertebrate species | 46 | Details |
| Corticotropin-releasing hormone | Humans | Hormone that plays a central role in whole body adaptation to stress. Released by the hypothalamus primarily in respo... more | 3 | Details |
| Corticotropin-releasing hormone receptor 1 | Humans | G protein-coupled receptor for CRH and UCN stress hormones, which plays a central role in whole body adaptation to st... more | 8 | Details |
| Corticotropin-releasing hormone receptor 2 | Humans | G protein-coupled receptor for CRH, UCN, UCN2 and UCN3 stress hormones, which plays a central role in whole body adap... more | 3 | Details |
| COUP transcription factor 1 | Humans | Coup (chicken ovalbumin upstream promoter) transcription factor binds to the ovalbumin promoter and, in conjunction w... more | 1 | Details |
| Creatine kinase B-type | Humans | Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatin... more | 4 | Details |
| Creatine kinase M-type | Humans | Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatin... more | 4 | Details |
| Creatine kinase S-type, mitochondrial | Humans | Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatin... more | 2 | Details |
| Creatine kinase U-type, mitochondrial | Humans | Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatin... more | 2 | Details |
| Creatine Kinases | Humans | Not Available | 4 | Details |
| CREB-binding protein | Humans | Acetylates histones, giving a specific tag for transcriptional activation. Mediates acetylation of histone H3 at 'Lys... more | 6 | Details |
| Cruzipain | Trypanosoma cruzi | Hydrolyzes chromogenic peptides at the carboxyl Arg or Lys; requires at least one more amino acid, preferably Arg, Ph... more | 15 | Details |
| Cryptochrome DASH | Synechocystis sp. (strain PCC 6803 / Kazusa) | May have a photoreceptor function. Binds DNA; represses transcription of at least 8 genes, including slr0364 and slr1... more | 1 | Details |
| CTP synthase 1 | Humans | CTP synthase involved in the de novo synthesis of CTP, a precursor of DNA, RNA and phospholipids. Catalyzes the ATP-d... more | 3 | Details |