| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596369 |
| Locus Tag | PA1172 |
| Description | cytochrome c-type protein NapC |
| Strain | Pseudomonas stutzeri ATCC 17588 = LMG 11199 |
| GI | 339493334 |
| Locus Tag | PSTAB_1257 |
| 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 |