| Sensor Kinase | Response Regulator | Family | Signal |
| CT467(AtoS) | CT468 (AtoC) | NtrC | Unknown |
| CPn0584 (AtoS) | CPn0586 (AtoC) | NtrC | Unknown |
| TP0520 (AtoS) | TP0519 (AtoC) | NtrC | |
| CT630 (DrrA) | OmpR | Phosphate ? | |
| CPn0750 (DrrA) | OmpR | ||
| HD1674 (ArcB) | OmpR | Aerobic respiration | |
| HD1677 (ArcB) | HD278 (ArcA) | ||
| HD1470 (CpxA) | HD1469 (CpxR) | OmpR | Cell envelope protein control |
| TP0363 (CheA) | TP0366 (CheY) | Chemotaxis | |
| TP0631 (CheB) | Chemotaxis | ||
| HD1345 (NarQ) | HD305 (NarP) | NarL | Nitrate |
| HD1346 (NarQ) | |||