| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P38036 | CRISPR-associated endonuclease/helicase Cas3; EC 3.1.-.-; EC 3.6.4.-; | ygcB; cas3; b2761 JW2731; | NP_417241.1;YP_490970.1; | 888 | escherichia-coli |
| Q46898 | CRISPR system Cascade subunit CasD; | casD; cas5 ygcI; b2757 JW5844; | NP_417237.2;YP_490966.1; | 224 | escherichia-coli |
| Q46897 | CRISPR system Cascade subunit CasE; EC 3.1.-.-; CasE endoRNase; crRNA endonuclease; | casE; cas6e ygcH; b2756 JW2726; | NP_417236.1;YP_490965.1; | 199 | escherichia-coli |
| Q46899 | CRISPR system Cascade subunit CasC; | casC; cas4 cse4 ygcJ; b2758 JW2728; | NP_417238.1;YP_490967.1; | 363 | escherichia-coli |
| P21179 | Catalase HPII; EC 1.11.1.6; Hydroxyperoxidase II; | katE; b1732 JW1721; | YP_025308.1;YP_489993.1; | 753 | escherichia-coli |
| P76364 | Cytoskeleton bundling-enhancing protein CbeA; Antitoxin CbeA; Antitoxin YeeU; | cbeA; yeeU; b2004 JW1986; | NP_416508.1;YP_490245.1; | 122 | escherichia-coli |
| Q47083 | HTH-type transcriptional regulator cbl; | cbl; b1987 JW1966; | NP_416492.1;YP_490231.1; | 316 | escherichia-coli |
| P36659 | Curved DNA-binding protein; | cbpA; b1000 JW0985; | NP_415520.1;YP_489273.1; | 306 | escherichia-coli |
| P63264 | Chaperone modulatory protein CbpM; | cbpM; yccD; b0999 JW0984; | NP_415519.1;YP_489272.1; | 101 | escherichia-coli |
| P31456 | Protein CbrA; CreB-regulated gene A protein; | cbrA; yidS; b3690 JW5631; | NP_418145.2;YP_491745.1; | 354 | escherichia-coli |
| P31468 | Inner membrane protein CbrB; CreB-regulated gene B protein; | cbrB; yieI; b3716 JW3694; | NP_418172.1;YP_491713.1; | 155 | escherichia-coli |
| P31469 | UPF0167 protein CbrC; CreB-regulated gene C protein; | cbrC; yieJ; b3717 JW3695; | NP_418173.1;YP_491712.1; | 195 | escherichia-coli |
| P64524 | Cytoskeleton-binding toxin CbtA; Toxin CbtA; Toxin YeeV; | cbtA; yeeV; b2005 JW1987; | NP_416509.1;YP_490246.1; | 124 | escherichia-coli |
| P06961 | Multifunctional CCA protein; EC 3.1.3.-; EC 3.1.4.-; EC 3.1.3.-; tRNA-NT; tRNA nucleotidyltransferase; tRNA adenylyl-/cytidylyl-transferase; tRNA CCA-pyrophosphorylase; CCA tRNA nucleotidyltransferase; EC 2.7.7.72; | cca; b3056 JW3028; | NP_417528.1;YP_491248.1; | 412 | escherichia-coli |
| P62552 | Antitoxin CcdA; LynA; Protein H; Protein LetA; | ccdA; H letA; ECOK12F042; | NP_061421.1;YP_001816480.1;YP_003108266.1;YP_003162544.1;YP_003829105.1;YP_003829230.1;YP_006940499.1;YP_009073797.1;YP_424850.1;YP_788019.1; | 72 | escherichia-coli |
| P62554 | Toxin CcdB; Cytotoxic protein CcdB; LynB; Protein G; Protein LetD; | ccdB; G letB letD; ECOK12F043; | NP_061422.1;YP_003108267.1;YP_009073798.1; | 101 | escherichia-coli |
| P33931 | Cytochrome c biogenesis ATP-binding export protein CcmA; EC 3.6.3.41; Heme exporter protein A; | ccmA; yejW; b2201 JW5366; | NP_416705.2;YP_490439.1; | 207 | escherichia-coli |
| P0ABL8 | Heme exporter protein B; Cytochrome c-type biogenesis protein CcmB; | ccmB; yejV; b2200 JW2188; | NP_416704.1;YP_490438.1; | 220 | escherichia-coli |
| P0ABM1 | Heme exporter protein C; Cytochrome c-type biogenesis protein CcmC; | ccmC; yejT yejU; b2199 JW2187; | NP_416703.1;YP_490437.1; | 245 | escherichia-coli |
| P0ABM5 | Heme exporter protein D; Cytochrome c-type biogenesis protein CcmD; | ccmD; yojM; b2198 JW2186; | NP_416702.1;YP_490436.1; | 69 | escherichia-coli |
