| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596369 |
| Locus Tag | PA1172 |
| Description | cytochrome c-type protein NapC |
| Strain | Pseudomonas stutzeri DSM 10701 |
| GI | 397686344 |
| Locus Tag | PSJM300_06155 |
| Description | periplasmic nitrate reductase c subunit |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83646109 |
| Locus Tag | HCH_03367 |
| Description | nitrate/TMAO reductases, membrane-bound tetraheme cytochrome subunit C |