| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species | 
| P77211 | Cation efflux system protein CusC; | cusC; ibeB ylcB; b0572 JW0561; | NP_415104.1;YP_488859.1; | 457 | escherichia-coli | 
| P77485 | Sensor kinase CusS; EC 2.7.13.3; | cusS; ybcZ; b0570 JW5082; | NP_415102.1;YP_488857.1; | 480 | escherichia-coli | 
| P69488 | Divalent-cation tolerance protein CutA; C-type cytochrome biogenesis protein CycY; | cutA; cutA1 cycY; b4137 JW4097; | NP_418560.1;YP_492280.1; | 112 | escherichia-coli | 
| P67826 | Copper homeostasis protein CutC; | cutC; cutCM; b1874 JW1863; | YP_025309.2;YP_490136.1; | 248 | escherichia-coli | 
| P08550 | Colicin V production protein; Protein DedE; Pur regulon 18 kDa protein; | cvpA; dedE; b2313 JW2310; | NP_416816.1;YP_490555.1; | 162 | escherichia-coli | 
| P00936 | Adenylate cyclase; EC 4.6.1.1; ATP pyrophosphate-lyase; Adenylyl cyclase; | cyaA; cya; b3806 JW3778; | NP_418250.1;YP_491636.1; | 848 | escherichia-coli | 
| P27838 | Protein CyaY; | cyaY; b3807 JW3779; | NP_418251.1;YP_491635.1; | 106 | escherichia-coli | 
| P0AAM1 | Probable Ni/Fe-hydrogenase 1 B-type cytochrome subunit; | hyaC; b0974 JW0956; | NP_415493.1;YP_489245.1; | 235 | escherichia-coli | 
| P0AAE0 | D-serine/D-alanine/glycine transporter; | cycA; dagA ytfD; b4208 JW4166; | NP_418629.1;YP_492350.1; | 470 | escherichia-coli | 
| P0ABJ9 | Cytochrome bd-I ubiquinol oxidase subunit 1; EC 1.10.3.14; Cytochrome bd-I oxidase subunit I; Cytochrome d ubiquinol oxidase subunit I; | cydA; cyd-1; b0733 JW0722; | NP_415261.2;YP_489012.1; | 522 | escherichia-coli | 
| P0ABK2 | Cytochrome bd-I ubiquinol oxidase subunit 2; EC 1.10.3.14; Cytochrome bd-I oxidase subunit II; Cytochrome d ubiquinol oxidase subunit II; | cydB; cyd-2; b0734 JW0723; | NP_415262.1;YP_489013.1; | 379 | escherichia-coli | 
| P23886 | ATP-binding/permease protein CydC; | cydC; mdrA mdrH surB; b0886 JW0869; | NP_415406.1;YP_489158.1; | 573 | escherichia-coli | 
| P29018 | ATP-binding/permease protein CydD; | cydD; htrD; b0887 JW0870; | NP_415407.1;YP_489159.1; | 588 | escherichia-coli | 
| P56100 | Cytochrome bd-I ubiquinol oxidase subunit X; EC 1.10.3.14; Cytochrome bd-I oxidase subunit X; Cytochrome d ubiquinol oxidase subunit X; | cydX; ybgT; b4515 JW0724; | YP_489014.1;YP_588444.1; | 37 | escherichia-coli | 
| P27111 | HTH-type transcriptional regulator CynR; Cyn operon transcriptional activator; | cynR; b0338 JW5894; | NP_414872.3;YP_488632.1; | 299 | escherichia-coli | 
| P00816 | Cyanate hydratase; Cyanase; EC 4.2.1.104; Cyanate hydrolase; Cyanate lyase; | cynS; cnt; b0340 JW0331; | NP_414874.1;YP_488634.1; | 156 | escherichia-coli | 
| P0ABE9 | Carbonic anhydrase 1; EC 4.2.1.1; Carbonate dehydratase 1; | cynT; b0339 JW0330; | NP_414873.1;YP_488633.1; | 219 | escherichia-coli | 
| P17583 | Cyanate transport protein CynX; | cynX; b0341 JW0332; | NP_414875.1;YP_488635.1; | 384 | escherichia-coli | 
| P0ABJ1 | Cytochrome bo(3) ubiquinol oxidase subunit 2; Cytochrome b562-o complex subunit II; Cytochrome o ubiquinol oxidase subunit 2; Cytochrome o subunit 2; Oxidase bo(3) subunit 2; Ubiquinol oxidase chain B; Ubiquinol oxidase polypeptide II; Ubiquinol oxidase s盽?盾 | cyoA; b0432 JW0422; | NP_414966.1;YP_488724.1; | 315 | escherichia-coli | 
| P0ABI8 | Cytochrome bo(3) ubiquinol oxidase subunit 1; EC 1.10.3.10; Cytochrome b562-o complex subunit I; Cytochrome o ubiquinol oxidase subunit 1; Cytochrome o subunit 1; Oxidase bo(3) subunit 1; Ubiquinol oxidase chain A; Ubiquinol oxidase polypeptide I; Ubiquin盽?盾 | cyoB; b0431 JW0421; | NP_414965.1;YP_488723.1; | 663 | escherichia-coli | 
