| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Methanococcus maripaludis S2 | MMP_RS05070 | | 4Fe-4S dicluster domain-containing protein | strong | 100 | 100 |
| o | Methanococcus maripaludis JJ | MMJJ_RS00065 | | 4Fe-4S dicluster domain-containing protein | strong | 97 | 100 |
| | Methanococcus maripaludis S2 | MMP_RS07725 | | 4Fe-4S dicluster domain-containing protein | strong | 39 | 85 |
| | Methanococcus maripaludis JJ | MMJJ_RS06630 | | 4Fe-4S dicluster domain-containing protein | strong | 39 | 85 |
| o | Serratia liquefaciens MT49 | IAI46_12535 | | 4Fe-4S dicluster domain-containing protein | no data | 30 | 90 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_03005 | | formate hydrogenlyase | insig. | 31 | 92 |
| o | Escherichia coli ECOR38 | HEPCGN_14795 | hycB | electron transporter | insig. | 35 | 88 |
| o | Klebsiella michiganensis M5al | BWI76_RS27070 | | 4Fe-4S ferredoxin | insig. | 35 | 91 |
| | Escherichia coli BL21 | ECD_02373 | | hydrogenase 4, 4Fe-4S subunit | insig. | 32 | 92 |
| | Escherichia coli BW25113 | b2481 | hyfA | hydrogenase 4 Fe-S subunit (VIMSS) | insig. | 32 | 92 |
| | Escherichia coli ECOR27 | NOLOHH_13560 | hyfA | hydrogenase 4 subunit HyfA | insig. | 32 | 92 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01248 | | Hydrogenase-4 component A | insig. | 32 | 92 |
| | Escherichia coli ECOR27 | NOLOHH_07850 | hycB | electron transporter | insig. | 35 | 88 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_3838 | | Fe-S-cluster-containing hydrogenase components 2 | insig. | 36 | 91 |
| o | Escherichia fergusonii Becca | EFB2_00234 | | Hydrogenase-4 component A | insig. | 35 | 88 |
| o | Escherichia coli ECRC100 | OKFHMN_15905 | hycB | electron transporter | cofit | 35 | 88 |
| o | Escherichia coli ECRC101 | MCAODC_06420 | hycB | electron transporter | insig. | 35 | 88 |
| o | Escherichia coli ECRC102 | NIAGMN_13665 | hycB | electron transporter | cofit | 35 | 88 |
| o | Escherichia coli ECRC62 | BNILDI_03695 | hycB | electron transporter | insig. | 35 | 88 |
| o | Escherichia coli ECRC98 | JDDGAC_19535 | hycB | electron transporter | insig. | 35 | 88 |
| o | Escherichia coli ECRC99 | KEDOAH_12245 | hycB | electron transporter | no data | 35 | 88 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_00131 | | Hydrogenase-4 component A | insig. | 35 | 88 |
| | Klebsiella michiganensis M5al | BWI76_RS22335 | | 4Fe-4S ferredoxin | insig. | 30 | 92 |
| o | Escherichia coli Nissle 1917 | ECOLIN_RS20435 | | 4Fe-4S binding protein | insig. | 35 | 88 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_07815 | | effector protein | insig. | 34 | 90 |
| o | Dickeya dianthicola 67-19 | HGI48_RS07285 | | 4Fe-4S dicluster domain-containing protein | insig. | 32 | 97 |
| | Escherichia coli ECOR38 | HEPCGN_21070 | hyfA | hydrogenase 4 subunit HyfA | insig. | 31 | 92 |
| | Escherichia coli ECRC100 | OKFHMN_21900 | hyfA | hydrogenase 4 subunit HyfA | sig. | 31 | 92 |
| | Escherichia coli ECRC101 | MCAODC_12430 | hyfA | hydrogenase 4 subunit HyfA | insig. | 31 | 92 |
| | Escherichia coli ECRC102 | NIAGMN_19670 | hyfA | hydrogenase 4 subunit HyfA | insig. | 31 | 92 |
| | Escherichia coli ECRC98 | JDDGAC_25845 | hyfA | hydrogenase 4 subunit HyfA | insig. | 31 | 92 |
| | Escherichia coli ECRC99 | KEDOAH_06320 | hyfA | hydrogenase 4 subunit HyfA | no data | 31 | 92 |
| | Escherichia coli ECRC62 | BNILDI_12370 | hyfA | hydrogenase 4 subunit HyfA | insig. | 31 | 92 |
| | Escherichia coli BL21 | ECD_03425 | | putative hydrogenase, 4Fe-4S ferredoxin-type component | insig. | 34 | 88 |
| | Escherichia coli BW25113 | b3573 | yiaI | predicted hydrogenase, 4Fe-4S ferredoxin-type component (NCBI) | sig. | 34 | 88 |
| | Rahnella sp. WP5 | EX31_RS19905 | | 4Fe-4S dicluster domain-containing protein | insig. | 27 | 98 |
| | Shewanella loihica PV-4 | Shew_3157 | | 4Fe-4S ferredoxin iron-sulfur binding domain-containing protein (RefSeq) | insig. | 32 | 91 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF437 | | Electron transport protein HydN | insig. | 35 | 90 |
| | Enterobacter sp. TBS_079 | MPMX20_03609 | | Hydrogenase-4 component A | insig. | 30 | 93 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_2815 | | Fe-S-cluster-containing hydrogenase components 2 | no data | 30 | 93 |
| | Enterobacter sp. TBS_079 | MPMX20_03329 | | Ferredoxin--NADP reductase | insig. | 30 | 99 |
| | Escherichia fergusonii Becca | EFB2_01199 | | Hydrogenase-4 component A | insig. | 30 | 92 |
| | Enterobacter sp. TBS_079 | MPMX20_00157 | | Iron-sulfur protein | insig. | 35 | 91 |
| | Shewanella amazonensis SB2B | Sama_2903 | | NrfC, Fe-S-cluster-containing hydrogenase component 1 (RefSeq) | insig. | 32 | 85 |
| o | Dickeya dadantii 3937 | DDA3937_RS07410 | | 4Fe-4S dicluster domain-containing protein | insig. | 31 | 97 |
| o | Dickeya dianthicola ME23 | DZA65_RS07795 | | 4Fe-4S dicluster domain-containing protein | insig. | 31 | 97 |
| | Escherichia coli BL21 | ECD_02574 | | hydrogenase 3, Fe-S subunit | insig. | 30 | 92 |
| | Pectobacterium carotovorum WPP14 | HER17_RS17065 | | 4Fe-4S dicluster domain-containing protein | insig. | 31 | 100 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01010 | | Hydrogenase-4 component A | insig. | 30 | 92 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS15220 | | formate hydrogenlyase subunit HycB | insig. | 30 | 92 |
| | Escherichia coli BW25113 | b2724 | hycB | hydrogenase 3, Fe-S subunit (NCBI) | sig. | 30 | 92 |
| | Serratia liquefaciens MT49 | IAI46_12495 | | electron transport protein HydN | no data | 30 | 90 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_0193 | | glutamate synthase small subunit family protein, proteobacterial | insig. | 31 | 98 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF3574 | | Tetrathionate reductase subunit B | insig. | 31 | 84 |
| | Dickeya dianthicola 67-19 | HGI48_RS21620 | | formate-dependent uric acid utilization protein AegA | insig. | 30 | 90 |
| | Dickeya dianthicola ME23 | DZA65_RS22605 | | formate-dependent uric acid utilization protein AegA | insig. | 30 | 90 |
| | Escherichia coli ECOR27 | NOLOHH_12420 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Escherichia coli ECRC100 | OKFHMN_20575 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Escherichia coli ECRC101 | MCAODC_11100 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Escherichia coli ECRC102 | NIAGMN_18345 | hycB | formate hydrogenlyase subunit HycB | cofit | 29 | 92 |
| | Escherichia coli ECRC62 | BNILDI_10970 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Escherichia coli ECRC98 | JDDGAC_24240 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Escherichia coli ECRC99 | KEDOAH_07560 | hycB | formate hydrogenlyase subunit HycB | no data | 29 | 92 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF4717 | | Formate hydrogenlyase subunit 2 | insig. | 29 | 92 |
| | Dickeya dianthicola 67-19 | HGI48_RS07350 | | 4Fe-4S binding protein | insig. | 33 | 73 |
| | Dickeya dadantii 3937 | DDA3937_RS07475 | | 4Fe-4S dicluster domain-containing protein | insig. | 33 | 67 |
| | Azospirillum sp. SherDot2 | MPMX19_03516 | | Hydrogenase-4 component A | no data | 39 | 58 |
| | Dickeya dianthicola ME23 | DZA65_RS07860 | | 4Fe-4S dicluster domain-containing protein | insig. | 36 | 58 |
| | Dickeya dadantii 3937 | DDA3937_RS04585 | | 4Fe-4S dicluster domain-containing protein | insig. | 34 | 94 |
| | Shewanella loihica PV-4 | Shew_0244 | | 4Fe-4S ferredoxin iron-sulfur binding domain-containing protein (RefSeq) | insig. | 30 | 97 |
| | Escherichia coli ECOR27 | NOLOHH_11545 | ygfS | Putative electron transport protein YgfS | insig. | 30 | 90 |
| | Escherichia coli ECRC62 | BNILDI_10070 | ygfS | Putative electron transport protein YgfS | insig. | 30 | 90 |
| | Escherichia coli BW25113 | b2886 | ygfS | putative oxidoreductase, Fe-S subunit (VIMSS) | insig. | 30 | 90 |
| | Escherichia coli ECOR38 | HEPCGN_19765 | hycB | formate hydrogenlyase subunit HycB | insig. | 29 | 92 |
| | Rhodospirillum rubrum S1H | Rru_A0323 | | 4Fe-4S ferredoxin, iron-sulfur binding (NCBI) | insig. | 31 | 90 |
| | Escherichia coli ECOR38 | HEPCGN_18905 | ygfS | Putative electron transport protein YgfS | insig. | 31 | 90 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS16595 | | 4Fe-4S dicluster domain-containing protein | cofit | 30 | 88 |
| | Escherichia coli BL21 | ECD_02718 | | putative 4Fe-4S ferredoxin-type oxidoreductase subunit | insig. | 30 | 90 |
| | Escherichia fergusonii Becca | EFB2_01016 | | Hydrogenase-4 component A | insig. | 30 | 90 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_00830 | | Hydrogenase-4 component A | insig. | 30 | 90 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS16075 | | 4Fe-4S dicluster domain-containing protein | insig. | 30 | 90 |
| | Pectobacterium carotovorum WPP14 | HER17_RS21750 | | 4Fe-4S dicluster domain-containing protein | no data | 28 | 90 |
| | Shewanella loihica PV-4 | Shew_3244 | | 4Fe-4S ferredoxin iron-sulfur binding domain-containing protein (RefSeq) | insig. | 32 | 94 |
| | Dickeya dadantii 3937 | DDA3937_RS21410 | | formate-dependent uric acid utilization protein AegA | insig. | 30 | 90 |
| | Serratia liquefaciens MT49 | IAI46_04870 | | tetrathionate reductase subunit TtrB | insig. | 29 | 86 |
| | Escherichia coli ECRC62 | BNILDI_06465 | nrfC | cytochrome c nitrite reductase Fe-S protein | insig. | 32 | 90 |
| | Escherichia coli ECOR27 | NOLOHH_05060 | nrfC | cytochrome c nitrite reductase Fe-S protein | insig. | 32 | 90 |
| | Escherichia coli ECOR38 | HEPCGN_06145 | dmsB | dimethylsulfoxide reductase subunit B | insig. | 31 | 84 |
| | Rhodospirillum rubrum S1H | Rru_A1426 | | 4Fe-4S ferredoxin, iron-sulfur binding (NCBI) | no data | 31 | 69 |
| | Shewanella sp. ANA-3 | Shewana3_0635 | | 4Fe-4S ferredoxin iron-sulfur binding domain-containing protein (RefSeq) | insig. | 34 | 74 |
| | Azospirillum brasilense Sp245 | AZOBR_RS23550 | | tetrathionate reductase subunit B | insig. | 32 | 84 |
| | Escherichia coli BL21 | ECD_03944 | | formate-dependent nitrite reductase, 4Fe4S subunit | insig. | 32 | 90 |
| | Escherichia coli ECRC100 | OKFHMN_12810 | nrfC | cytochrome c nitrite reductase Fe-S protein | insig. | 32 | 90 |
| | Escherichia coli ECRC101 | MCAODC_03320 | nrfC | cytochrome c nitrite reductase Fe-S protein | insig. | 32 | 90 |
| | Escherichia coli ECRC102 | NIAGMN_10655 | nrfC | cytochrome c nitrite reductase Fe-S protein | cofit | 32 | 90 |
| | Escherichia coli ECRC98 | JDDGAC_16445 | nrfC | cytochrome c nitrite reductase Fe-S protein | insig. | 32 | 90 |
| | Escherichia coli ECRC99 | KEDOAH_15340 | nrfC | cytochrome c nitrite reductase Fe-S protein | no data | 32 | 90 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_03968 | | putative ferredoxin-like protein YdhX | insig. | 32 | 90 |
| | Escherichia coli BW25113 | b4072 | nrfC | formate-dependent nitrite reductase, 4Fe4S subunit (NCBI) | insig. | 32 | 90 |
| | Dickeya dianthicola ME23 | DZA65_RS04465 | | 4Fe-4S dicluster domain-containing protein | insig. | 33 | 94 |