| Strain | Pseudomonas fluorescens A506 |
| GI | 387895053 |
| Locus Tag | PflA506_3913 |
| Description | assimilatory nitrite reductase [NAD(P)H], small subunit |
| Strain | Pseudomonas denitrificans ATCC 13867 |
| GI | 472325303 |
| Locus Tag | H681_10685 |
| Description | assimilatory nitrite reductase small subunit |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83648462 |
| Locus Tag | HCH_05822 |
| Description | ferredoxin subunit of nitrite reductase and ring-hydroxylating dioxygenases |