| Strain | Pseudomonas fulva 12-X |
| GI | 333901124 |
| Locus Tag | Psefu_2939 |
| Description | nitrate reductase cytochrome c-type subunit (NapB) |
| Strain | Pseudomonas mendocina NK-01 |
| GI | 330504173 |
| Locus Tag | MDS_3259 |
| Description | periplasmic nitrate reductase subunit NapB |
| Strain | Pseudomonas brassicacearum subsp. brassicacearum NFM421 |
| GI | 330808889 |
| Locus Tag | PSEBR_a2089 |
| Description | diheme cytochrome c |