9 component system: The H+ or Na+-translocating NADH Dehydrogenase (NDH) Family
| P23481 | Hydrogenase-4 component A |
|---|---|
| P23482 | Hydrogenase-4 component B |
| P77858 | Hydrogenase-4 component C |
| P77416 | Hydrogenase-4 component D |
| P0AEW1 | Hydrogenase-4 component E |
| P77437 | Hydrogenase-4 component F |
| P77329 | Hydrogenase-4 component G |
| P77423 | Hydrogenase-4 component H |
| P77668 | Hydrogenase-4 component I |