| Strain | Pseudomonas aeruginosa UCBPP-PA14 |
| GI | 116051914 |
| Locus Tag | PA14_13740 |
| Description | two-component sensor NarX |
| Strain | Pseudomonas brassicacearum subsp. brassicacearum NFM421 |
| GI | 330810001 |
| Locus Tag | PSEBR_a3151 |
| Description | two component system, sensor kinase NarX |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83646719 |
| Locus Tag | HCH_04013 |
| Description | signal transduction histidine kinase, nitrate/nitrite-specific |