| CUU03002.1 | Kryptonium thompsoni | [NiFe] Group 1d | Kryptonia | N/A | Aerobic Uptake | Tolerant | 3 | [NiFe]-centre, 1 x [4Fe3S] cluster, 1 x [3Fe4S] cluster, 1 x [4Fe4S] cluster | Cytochrome b |
| AIO19709.1 | Mollicutes bacterium HR1 | [FeFe] Group A3 | Tenericutes | Mollicutes | Bifurcating | Labile | 3 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | NADH dehydrogenase, thioredoxin |
| AIO19694.1 | Mollicutes bacterium HR1 | [FeFe] Group A3 | Tenericutes | Mollicutes | Bifurcating | Labile | 3 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | NADH dehydrogenase, thioredoxin |
| AIO18671.1 | Mollicutes bacterium HR1 | [FeFe] Group A3 | Tenericutes | Mollicutes | Bifurcating | Labile | 2 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | NADH dehydrogenase |
| AIO18483.1 | Mollicutes bacterium HR1 | [FeFe] Group B | Tenericutes | Mollicutes | Evolving | Labile | 1 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | None |
| AIO18481.1 | Mollicutes bacterium HR1 | [FeFe] Group C3 | Tenericutes | Mollicutes | Sensory | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Phosphatase, thioredoxin |
| AIO18212.1 | Mollicutes bacterium HR1 | [FeFe] Group A3 | Tenericutes | Mollicutes | Bifurcating | Labile | 3 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | NADH dehydrogenase, thioredoxin |
| AEM79842.1 | Thermoanaerobacter wiegelii | [FeFe] Group C3 | Firmicutes | Thermoanaerobacterales | Sensory | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Phosphatase, thioredoxin |
| ADK12981.1 | Thiocapsa roseopersicina | [NiFe] Group 3d | Gammaproteobacteria | Chromatiales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
| AAX40740.1 | Thiocapsa roseopersicina | [NiFe] Group 2b | Gammaproteobacteria | Chromatiales | Sensory | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Histidine kinase, response regulator |
| AAP50523.1 | Thiocapsa roseopersicina | [NiFe] Group 3d | Gammaproteobacteria | Chromatiales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
| AAC38282.1 | Thiocapsa roseopersicina | [NiFe] Group 1e | Gammaproteobacteria | Chromatiales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | Cytochrome b, [FeS] protein |
| AAB49361.1 | Alcaligenes hydrogenophilus | [NiFe] Group 2b | Betaproteobacteria | Burkholderiales | Sensory | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Histidine kinase, response regulator |
| AAB25780.1 | Alcaligenes hydrogenophilus | [NiFe] Group 1d | Betaproteobacteria | Burkholderiales | Aerobic Uptake | Tolerant | 3 | [NiFe]-centre, 1 x [4Fe3S] cluster, 1 x [3Fe4S] cluster, 1 x [4Fe4S] cluster | Cytochrome b |
| AAA27410.1 | Thiocapsa roseopersicina | [NiFe] Group 1d | Gammaproteobacteria | Chromatiales | Aerobic Uptake | Tolerant | 3 | [NiFe]-centre, 1 x [4Fe3S] cluster, 1 x [3Fe4S] cluster, 1 x [4Fe4S] cluster | Cytochrome b |