| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P52647 | Probable pyruvate-flavodoxin oxidoreductase; EC 1.2.7.-; | ydbK; b1378 JW1372; | NP_415896.1;YP_489646.1; | 1174 | escherichia-coli |
| P33591 | Nickel transport system permease protein NikB; | nikB; b3477 JW3442; | NP_417934.1;YP_491957.1; | 314 | escherichia-coli |
| P0AFA9 | Nickel transport system permease protein NikC; | nikC; b3478 JW3443; | NP_417935.1;YP_491956.1; | 277 | escherichia-coli |
| P33593 | Nickel import ATP-binding protein NikD; EC 3.6.3.24; | nikD; b3479 JW3444; | NP_417936.1;YP_491955.1; | 254 | escherichia-coli |
| P33590 | Nickel-binding periplasmic protein; | nikA; b3476 JW3441; | NP_417933.1;YP_491958.1; | 524 | escherichia-coli |
| P33594 | Nickel import ATP-binding protein NikE; EC 3.6.3.24; | nikE; b3480 JW3445; | NP_417937.1;YP_491954.1; | 268 | escherichia-coli |
| P0A6Z6 | Nickel-responsive regulator; | nikR; yhhG; b3481 JW3446; | NP_417938.1;YP_491953.1; | 133 | escherichia-coli |
| Q47270 | Protein NinE homolog from lambdoid prophage DLP12; | ninE; b0548 JW0536; | NP_415080.1;YP_488835.1; | 56 | escherichia-coli |
| P08201 | Nitrite reductase (NADH) large subunit; EC 1.7.1.15; | nirB; b3365 JW3328; | NP_417824.1;YP_492066.1; | 847 | escherichia-coli |
| P0AC26 | Nitrite transporter NirC; | nirC; b3367 JW3330; | YP_026212.2;YP_492064.1; | 268 | escherichia-coli |
| P0A9I8 | Nitrite reductase (NADH) small subunit; EC 1.7.1.15; | nirD; b3366 JW3329; | NP_417825.1;YP_492065.1; | 108 | escherichia-coli |
| P04846 | Lipoprotein 28; | nlpA; b3661 JW3635; | NP_418117.1;YP_491774.1; | 272 | escherichia-coli |
| P23898 | Probable endopeptidase NlpC; EC 3.4.-.-; ORF-17; Probable lipoprotein NlpC; | nlpC; b1708 JW1698; | NP_416223.1;YP_489970.1; | 154 | escherichia-coli |
| P0ADA3 | Murein hydrolase activator NlpD; | nlpD; b2742 JW2712; | NP_417222.1;YP_490951.1; | 379 | escherichia-coli |
| P40710 | Lipoprotein NlpE; Copper homeostasis protein CutF; | nlpE; cutF; b0192 JW0188; | NP_414734.1;YP_488495.1; | 236 | escherichia-coli |
| P0AFB1 | Lipoprotein NlpI; | nlpI; yhbM; b3163 JW3132; | NP_417632.1;YP_491350.1; | 294 | escherichia-coli |
| P21420 | Putative outer membrane porin protein NmpC; | nmpC; phmA; b0553; | NULL | 365 | escherichia-coli |
| P31806 | Bifunctional NAD(P)H-hydrate repair enzyme Nnr; Nicotinamide nucleotide repair protein; NAD(P)HX epimerase; ADP-dependent NAD(P)HX dehydratase; EC 5.1.99.6; S)-NAD(P)H-hydrate dehydratase (EC 4.2.1.136; | nnr; yjeF; b4167 JW4125; | NP_418588.1;YP_492309.1; | 515 | escherichia-coli |
| P31061 | Putative prophage Qin DNA-packaging protein NU1 homolog; | nohA; b1548 JW1541; | YP_489811.1; | 189 | escherichia-coli |
| P31062 | DNA-packaging protein NU1 homolog; | nohD; nohB; b0560 JW0549; | NP_415092.1;YP_488848.1; | 181 | escherichia-coli |
