| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P52095 | Lysine decarboxylase, constitutive; LDC; EC 4.1.1.18; | ldcC; ldc ldcH; b0186 JW0181; | NP_414728.1;YP_488488.1; | 713 | escherichia-coli |
| P0AED9 | DNA-cytosine methyltransferase; EC 2.1.1.37; M.EcoDcm; | dcm; mec; b1961 JW1944; | NP_416470.1;YP_490214.1; | 472 | escherichia-coli |
| P21169 | Ornithine decarboxylase, constitutive; EC 4.1.1.17; | speC; b2965 JW5482; | NP_417440.4;YP_491164.1; | 711 | escherichia-coli |
| P24169 | Ornithine decarboxylase, inducible; EC 4.1.1.17; | speF; b0693 JW0680; | NP_415220.1;YP_488973.1; | 732 | escherichia-coli |
| P24171 | Peptidyl-dipeptidase dcp; EC 3.4.15.5; Dipeptidyl carboxypeptidase; | dcp; b1538 JW1531; | NP_416056.1;YP_489801.1; | 681 | escherichia-coli |
| P0AEE1 | Protein DcrB; | dcrB; yhhR; b3472 JW5682; | NP_417929.4;YP_491962.1; | 185 | escherichia-coli |
| P0A830 | Aerobic C4-dicarboxylate transport protein; | dctA; b3528 JW3496; | NP_417985.1;YP_491907.1; | 428 | escherichia-coli |
| P37195 | HTH-type transcriptional regulator DctR; | dctR; yhiF; b3507 JW3475; | NP_417964.1;YP_491928.1; | 176 | escherichia-coli |
| P0ABN5 | Anaerobic C4-dicarboxylate transporter DcuA; | dcuA; genA; b4138 JW5735; | NP_418561.1;YP_492281.1; | 433 | escherichia-coli |
| P0ABP3 | Anaerobic C4-dicarboxylate transporter DcuC; | dcuC; b0621 JW0613/JW0616; | NP_415154.1; | 461 | escherichia-coli |
| P0ABN9 | Anaerobic C4-dicarboxylate transporter DcuB; | dcuB; genF; b4123 JW4084; | NP_418547.1;YP_009074462.1;YP_492266.1; | 446 | escherichia-coli |
| P45428 | Putative cryptic C4-dicarboxylate transporter DcuD; | dcuD; yhcL; b3227 JW3196; | NP_417694.1;YP_491411.1; | 455 | escherichia-coli |
| P29680 | Uroporphyrinogen decarboxylase; UPD; URO-D; EC 4.1.1.37; | hemE; b3997 JW3961; | NP_418425.1;YP_491463.1; | 354 | escherichia-coli |
| P0AEC8 | Sensor histidine kinase DcuS; EC 2.7.13.3; Fumarate sensor; | dcuS; yjdH; b4125 JW4086; | NP_418549.1;YP_492268.1; | 543 | escherichia-coli |
| P0AD01 | Transcriptional regulatory protein DcuR; | dcuR; yjdG; b4124 JW4085; | NP_418548.1;YP_492267.1; | 239 | escherichia-coli |
| P76316 | D-cysteine desulfhydrase; EC 4.4.1.15; | dcyD; yedO; b1919 JW5313; | NP_416429.4;YP_490176.1; | 328 | escherichia-coli |
| P0A6J8 | D-alanine--D-alanine ligase A; EC 6.3.2.4; D-Ala-D-Ala ligase A; D-alanylalanine synthetase A; | ddlA; b0381 JW0372; | NP_414915.1;YP_488674.1; | 364 | escherichia-coli |
| P07862 | D-alanine--D-alanine ligase B; EC 6.3.2.4; D-Ala-D-Ala ligase B; D-alanylalanine synthetase B; | ddlB; ddl; b0092 JW0090; | NP_414634.1;YP_488397.1; | 306 | escherichia-coli |
| P76128 | Probable D,D-dipeptide-binding periplasmic protein DdpA; | ddpA; yddS; b1487 JW5240; | NP_416004.1;YP_489752.1; | 516 | escherichia-coli |
| P77268 | Probable D,D-dipeptide transport ATP-binding protein DdpD; | ddpD; yddP; b1484 JW1479; | NP_416001.1;YP_489749.1; | 328 | escherichia-coli |
