| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596369 |
| Locus Tag | PA1172 |
| Description | cytochrome c-type protein NapC |
| Strain | Pseudomonas mendocina NK-01 |
| GI | 330504174 |
| Locus Tag | MDS_3260 |
| Description | periplasmic nitrate reductase subunit NapC |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83646109 |
| Locus Tag | HCH_03367 |
| Description | nitrate/TMAO reductases, membrane-bound tetraheme cytochrome subunit C |