| WP_013275594.1 | Thermosediminibacter oceani | [FeFe] Group A4 | Firmicutes | Thermoanaerobacterales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_014282026.1 | Paenibacillus terrae | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_015337360.1 | Desulfovibrio hydrothermalis | [FeFe] Group A4 | Deltaproteobacteria | Desulfovibrionales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_016822145.1 | Paenibacillus polymyxa | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_018591881.1 | Terrisporobacter glycolicus | [FeFe] Group A4 | Firmicutes | Clostridiales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_018884458.1 | Paenibacillus massiliensis | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_021432325.1 | Peptoclostridium bifermentans | [FeFe] Group A4 | Firmicutes | Clostridiales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_023975234.1 | Clostridium pasteurianum | [FeFe] Group A4 | Firmicutes | Clostridiales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_024825939.1 | Desulfovibrio magneticus | [FeFe] Group A4 | Deltaproteobacteria | Desulfovibrionales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_025688954.1 | Paenibacillus zanthoxyli | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_025700928.1 | Paenibacillus forsythiae | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_026885750.1 | Clostridium beijerinckii | [FeFe] Group A4 | Firmicutes | Clostridiales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_027186285.1 | Desulfovibrio inopinatus | [FeFe] Group A4 | Deltaproteobacteria | Desulfovibrionales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_027721164.1 | Desulfovibrio zosterae | [FeFe] Group A4 | Deltaproteobacteria | Desulfovibrionales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_028591227.1 | Paenibacillus panacisoli | [FeFe] Group A4 | Firmicutes | Bacillales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_027186285.1 | Desulfovibrio inopinatus | [FeFe] Group A4 | Deltaproteobacteria | Desulfovibrionales | Evolving | Labile | 3 | [FeFe]-centre, 2 x [4Fe4S] clusters | FeS protein, FeS protein |
| WP_009618950.1 | Desulfosporosinus sp. OT | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with diguanylate cyclase |
| WP_014186347.1 | Desulfosporosinus orientis | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with diguanylate cyclase |
| XP_001322682.1 | Trichomonas vaginalis | [FeFe] Group A1 | Metamonada | Trichomonadida | Evolving | Labile | 1 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | Fusion with ferredoxin reductase |
| WP_011640458.1 | Syntrophomonas wolfei | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with histidine kinase |
| WP_014186754.1 | Desulfosporosinus orientis | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with histidine kinase |
| WP_015709814.1 | Treponema azotonutricium | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with histidine kinase |
| WP_006928132.1 | Caldithrix abyssi | [FeFe] Group C3 | Caldithrix | Caldithrixales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with histidine kinase |
| WP_014559402.1 | Ignavibacterium album | [FeFe] Group C3 | Ignavibacteriae | Ignavibacteriales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with histidine kinase |
| WP_002848484.1 | Ruminococcus albus | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_004064152.1 | Eubacterium plexicaudatum | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_010251391.1 | Acetivibrio cellulolyticus | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013255981.1 | Spirochaeta smaragdinae | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013314414.1 | Spirochaeta thermophila | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013623612.1 | Syntrophobotulus glycolicus | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013701174.1 | Treponema succinifaciens | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013757426.1 | Treponema brennaborense | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013907653.1 | Thermodesulfatator indicus | [FeFe] Group C2 | Thermodesulfobacteria | Thermodesulfobacteriales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_013969799.1 | Treponema caldaria | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_014080084.1 | Roseburia hominis | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_014184511.1 | Desulfosporosinus orientis | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_014903221.1 | Desulfosporosinus meridiei | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_015560495.1 | Roseburia intestinalis | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_015713064.1 | Treponema azotonutricium | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_022931679.1 | Treponema bryantii | [FeFe] Group C2 | Spirochaetes | Spirochaetales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_027398671.1 | Anaerovorax odorimutans | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_027626440.1 | Clostridium lundense | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_028517519.1 | Ruminococcus flavefaciens | [FeFe] Group C2 | Firmicutes | Clostridiales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| WP_014296384.1 | Marinitoga piezophila | [FeFe] Group C3 | Thermotogae | Thermotogales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with methyl-accepting chemotaxis protein |
| XP_001580488.1 | Trichomonas vaginalis | [FeFe] Group A1 | Metamonada | Trichomonadida | Evolving | Labile | 1 | [FeFe]-centre, 3 x [4Fe4S] clusters, 1 x [2Fe2S] cluster | Fusion with sulfite reductase |
| WP_004514179.1 | Geobacter metallireducens | [FeFe] Group C3 | Deltaproteobacteria | Desulfuromonadales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with transcriptional activator |
| WP_006002638.1 | Desulfuromonas acetoxidans | [FeFe] Group C3 | Deltaproteobacteria | Desulfovibrionales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with transcriptional activator |
| WP_010663847.1 | Marinilabilia salmonicolor | [FeFe] Group C3 | Bacteroidetes | Bacteroidales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with transcriptional activator |
| WP_011342071.1 | Pelobacter carbinolicus | [FeFe] Group C3 | Deltaproteobacteria | Desulfuromonadales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with transcriptional activator |
| WP_011393215.1 | Moorella thermoacetica | [FeFe] Group C3 | Firmicutes | Thermoanaerobacterales | Sensory | Labile | 1 | [FeFe]-centre, 2 x [4Fe4S] clusters, PAS domain | Fusion with transcriptional activator |