| Phylum | Firmicutes |
| Order | Clostridiales |
| Organism | Eubacterium hallii |
| Hydrogenase | [FeFe] Group A1 |
| Activity (Predicted) | Evolving |
| Oxygen Tolerance (Predicted) | Labile |
| Subunits (Predicted) | 1 |
| Metal Centres (Predicted) | [FeFe]-centre, 2 x [4Fe4S] clusters |
| Accessory Subunits (Predicted) | None |
MLMNRTTPFMVPVDDANPAIIKNEALCSECGHCFAVCEEEIGVAAKYLLNQREAYQCIGCGQCSAVCPEKAITGRPHYKIVKELIQDPEKIVVFSTSPSVRVGFADGFGKEPGTFAQDEMVGALRALGADYVFDVTFSADLTIMEEGSELLSRILKGTGPLPQFTSCCPAWVKYMENFHPDKTKYLSSAKSPIGMQGAVIKTYFAHKKHIDPEKIISVAVTPCTAKKAEIAREELCDAGKLLNIEEMRDNDYVITTKELVQWCKEEGMDLGKITPSKYDSVLGEGTGAGMIFGNTGGVMEAALRTVYRVLEGKEAPADFYQLRPVRGLNNRKEAEVTIAGKNLKVCILYGTAAAEEFLAEDMSGYHFVEVMTCPGGCISGAGQPDCGSVPVSDAVRKKRIASLYQADERAQYRNSMDNPEIGMIYNEFFKEPLSLLSETLLHTTYKSK