| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P06610 | Vitamin B12 transport periplasmic protein BtuE; EC 1.-.-.-; | btuE; b1710 JW1700; | NP_416225.1;YP_489972.1; | 183 | escherichia-coli |
| P0A9H5 | Cob(I)yrinic acid a,c-diamide adenosyltransferase; EC 2.5.1.17; Cob(I)alamin adenosyltransferase; Corrinoid adenosyltransferase; | btuR; cobA; b1270 JW1262; | NP_415786.1;YP_489538.1; | 196 | escherichia-coli |
| P0ABE5 | Cytochrome b561; Cytochrome b-561; | cybB; b1418 JW5224; | NP_415935.2;YP_489683.1; | 176 | escherichia-coli |
| P75925 | Cytochrome b561 homolog 2; | yceJ; b1057 JW1044; | NP_415575.1;YP_489325.1; | 188 | escherichia-coli |
| P76345 | Cytochrome b561 homolog 1; | yodB; b1974 JW5323; | NP_416483.4;YP_490224.1; | 176 | escherichia-coli |
| P23890 | Transcriptional activator CadC; | cadC; b4133 JW4094; | NP_418557.1;YP_492277.1; | 512 | escherichia-coli |
| P0AAE8 | Probable cadaverine/lysine antiporter; | cadB; b4132 JW4093; | NP_418556.1;YP_492276.1; | 444 | escherichia-coli |
| P60584 | Crotonobetainyl-CoA dehydrogenase; EC 1.3.99.-; Crotonobetainyl-CoA reductase; | caiA; yaaO; b0039 JW0038; | NP_414581.1;YP_488345.1; | 380 | escherichia-coli |
| P31572 | L-carnitine CoA-transferase; EC 2.8.3.21; Crotonobetainyl-CoA:carnitine CoA-transferase; | caiB; yaaN; b0038 JW0037; | NP_414580.1;YP_488344.1; | 405 | escherichia-coli |
| P31552 | Probable crotonobetaine/carnitine-CoA ligase; EC 6.2.1.-; | caiC; yaaM; b0037 JW0036; | NP_414579.4;YP_488343.1; | 517 | escherichia-coli |
| P31551 | Carnitinyl-CoA dehydratase; EC 4.2.1.149; Crotonobetainyl-CoA hydratase; | caiD; yaaL; b0036 JW0035; | NP_414578.2;YP_488342.1; | 261 | escherichia-coli |
| P39206 | Carnitine operon protein CaiE; | caiE; b0035 JW5004; | NP_414577.2;YP_488341.1; | 196 | escherichia-coli |
| P0AE58 | Transcriptional activatory protein CaiF; | caiF; b0034 JW0033; | NP_414576.4;YP_488340.1; | 131 | escherichia-coli |
| P31553 | L-carnitine/gamma-butyrobetaine antiporter; | caiT; yaaP; b0040 JW0039; | NP_414582.1;YP_488346.1; | 504 | escherichia-coli |
| P61517 | Carbonic anhydrase 2; EC 4.2.1.1; Carbonate dehydratase 2; | can; cynT2 yadF; b0126 JW0122; | NP_414668.1;YP_488429.1; | 220 | escherichia-coli |
| P00864 | Phosphoenolpyruvate carboxylase; PEPC; PEPCase; EC 4.1.1.31; | ppc; glu; b3956 JW3928; | NP_418391.1;YP_491496.1; | 883 | escherichia-coli |
| P0A6F1 | Carbamoyl-phosphate synthase small chain; EC 6.3.5.5; Carbamoyl-phosphate synthetase glutamine chain; | carA; pyrA; b0032 JW0030; | NP_414573.1;YP_488338.1; | 382 | escherichia-coli |
| P00968 | Carbamoyl-phosphate synthase large chain; EC 6.3.5.5; Carbamoyl-phosphate synthetase ammonia chain; | carB; pyrA; b0033 JW0031; | NP_414574.1;YP_488339.1; | 1073 | escherichia-coli |
| Q46896 | CRISPR-associated endonuclease Cas1; EC 3.1.-.-; | ygbT; cas1; b2755 JW2725; | NP_417235.1;YP_490964.1; | 305 | escherichia-coli |
| P45956 | CRISPR-associated endoribonuclease Cas2; EC 3.1.-.-; | ygbF; cas2; b2754 JW5438; | NP_417234.2;YP_490963.1; | 94 | escherichia-coli |
