Status Description Organism Genes References
hydrogenase 4 membrane subunit Aggregatibacter actinomycetemcomitans hyfE
hydrogenase small subunit Aquifex aeolicus mbhS1
hydrogenase large subunit Aquifex aeolicus mbhL1
hydrogenase small subunit Aquifex aeolicus mbhS3
hydrogenase large subunit Aquifex aeolicus mbhL3
hydrogenase large subunit Aquifex aeolicus mbhL2
hydrogenase small subunit Aquifex aeolicus mbhS2
putative hydrogenase protein Azospirillum brasilense hycD
hydrogenase large subunit protein Azorhizobium caulinodans hupL
hydrogenase/urease accessory protein Azorhizobium caulinodans hupE