| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Azospirillum sp. SherDot2 | MPMX19_00462 | | Caffeyl-CoA reductase-Etf complex subunit CarE | insig. | 100 | 100 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS05475 | | protein fixB | strong | 89 | 100 |
| o | Rhodospirillum rubrum S1H | Rru_A2266 | | Electron transfer flavoprotein (NCBI) | strong | 67 | 97 |
| o | Methylophilus sp. DMC18 | GFF121 | | Caffeyl-CoA reductase-Etf complex subunit CarE | insig. | 66 | 97 |
| o | Xanthobacter sp. DMC5 | GFF4893 | | Caffeyl-CoA reductase-Etf complex subunit CarE | insig. | 65 | 99 |
| o | Rhodopseudomonas palustris CGA009 | TX73_023915 | | electron transfer flavoprotein subunit alpha/FixB family protein | strong | 64 | 99 |
| o | Paraburkholderia sabiae LMG 24235 | QEN71_RS42225 | | electron transfer flavoprotein subunit alpha/FixB family protein | cofit | 64 | 99 |
| o | Herbaspirillum seropedicae SmR1 | HSERO_RS14225 | | protein fixB | strong | 63 | 99 |
| o | Dechlorosoma suillum PS | Dsui_0575 | | electron transfer flavoprotein, alpha subunit | strong | 63 | 100 |
| | Dechlorosoma suillum PS | Dsui_3149 | | electron transfer flavoprotein, alpha subunit | cofit | 62 | 98 |
| o | Sinorhizobium meliloti 1021 | SMa0819 | | FixB electron transfer flavoprotein alpha chain | insig. | 62 | 94 |
| o | Fusobacterium nucleatum SB010 | HUW76_04760 | | electron transfer flavoprotein subunit alpha/FixB family protein | cofit | 41 | 93 |
| o | Bacteroides stercoris CC31F | HMPREF1181_RS14020 | | electron transfer flavoprotein subunit alpha/FixB family protein | sig. | 41 | 91 |
| o | Phocaeicola dorei CL03T12C01 | ABI39_RS01730 | | electron transfer flavoprotein subunit alpha/FixB family protein | strong | 40 | 92 |
| o | Bacteroides ovatus ATCC 8483 | BACOVA_04538 | | electron transfer flavoprotein FAD-binding domain protein | strong | 40 | 91 |
| o | Bacteroides thetaiotaomicron VPI-5482 | BT1805 | | electron transfer flavoprotein alpha-subunit (NCBI ptt file) | strong | 40 | 91 |
| o | Phocaeicola vulgatus CL09T03C04 | HMPREF1058_RS02485 | | electron transfer flavoprotein subunit alpha/FixB family protein | strong | 40 | 92 |
| o | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS15105 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 41 | 91 |
| | Fusobacterium nucleatum SB010 | HUW76_09415 | | electron transfer flavoprotein subunit alpha/FixB family protein | strong | 32 | 92 |
| | Mycobacterium tuberculosis H37Rv | Rv3028c | | Probable electron transfer flavoprotein (alpha-subunit) FixB (alpha-ETF) (electron transfer flavoprotein large subunit) (ETFLS) | no data | 34 | 92 |
| o | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS09170 | | electron transfer flavoprotein subunit alpha/FixB family protein | cofit | 33 | 90 |
| o | Echinicola vietnamensis KMM 6221, DSM 17526 | Echvi_2952 | | Electron transfer flavoprotein, alpha subunit | no data | 33 | 91 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_08115 | | electron transfer flavoprotein subunit alpha | strong | 32 | 91 |
| o | Pedobacter sp. GW460-11-11-14-LB5 | CA265_RS08865 | | electron transfer flavoprotein subunit alpha | no data | 31 | 91 |
| o | Escherichia coli Nissle 1917 | ECOLIN_RS00230 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 32 | 93 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS36420 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 33 | 90 |
| | Dechlorosoma suillum PS | Dsui_2304 | | electron transfer flavoprotein, alpha subunit | strong | 40 | 64 |
| o | Escherichia coli ECRC100 | OKFHMN_10890 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 31 | 93 |
| o | Escherichia coli ECRC101 | MCAODC_01405 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 31 | 93 |
| o | Escherichia coli ECRC102 | NIAGMN_08740 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | cofit | 31 | 93 |
| o | Escherichia coli ECRC98 | JDDGAC_14485 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 31 | 93 |
| o | Escherichia coli ECRC99 | KEDOAH_17265 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 31 | 93 |
| | Rhodospirillum rubrum S1H | Rru_A3078 | | Electron transfer flavoprotein (NCBI) | no data | 39 | 65 |
| o | Escherichia coli BL21 | ECD_00046 | | putative electron transfer flavoprotein, NAD/FAD-binding domain and ETFP adenine nucleotide-binding domain-like protein | insig. | 31 | 93 |
| o | Escherichia coli ECRC62 | BNILDI_08380 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | cofit | 31 | 93 |
| o | Escherichia coli BW25113 | b0042 | fixB | predicted electron transfer flavoprotein, NAD/FAD-binding domain and ETFP adenine nucleotide-binding domain-like (NCBI) | insig. | 31 | 93 |
| o | Escherichia coli ECOR27 | NOLOHH_03225 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 31 | 93 |
| o | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_03614 | | Protein FixB | insig. | 31 | 93 |
| | Lysobacter sp. OAE881 | ABIE51_RS04360 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 36 | 63 |
| o | Escherichia fergusonii Becca | EFB2_04003 | | Protein FixB | insig. | 31 | 93 |
| o | Escherichia coli ECOR38 | HEPCGN_08880 | fixB | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 31 | 93 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.4488.1 | | Electron transfer flavoprotein, alpha subunit | no data | 37 | 64 |
| o | Shewanella loihica PV-4 | Shew_2678 | | electron transfer flavoprotein, alpha subunit (RefSeq) | insig. | 32 | 82 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS07035 | | FAD-binding protein | no data | 37 | 65 |
| | Shewanella amazonensis SB2B | Sama_1170 | | electron transfer flavoprotein, alpha subunit (RefSeq) | strong | 36 | 72 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS06645 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 39 | 65 |
| | Sinorhizobium meliloti 1021 | SMc00728 | | electron transfer flavoprotein alpha-subunit alpha-ETF flavoprotein | no data | 36 | 72 |
| o | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF203 | | Electron transfer flavoprotein, alpha subunit FixB | insig. | 31 | 93 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_2280 | | Electron transfer flavoprotein, alpha subunit | no data | 40 | 63 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS07560 | | electron transfer flavoprotein subunit beta | no data | 38 | 65 |
| | Dyella japonica UNC79MFTsu3.2 | ABZR86_RS18815 | | FAD-binding protein | strong | 34 | 65 |
| | Cellulophaga baltica 18 | M666_RS08080 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 29 | 90 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_03367 | | electron transfer flavoprotein alpha subunit apoprotein | insig. | 40 | 64 |
| | Kangiella aquimarina DSM 16071 | B158DRAFT_1453 | | electron transfer flavoprotein alpha subunit apoprotein | strong | 38 | 65 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS10675 | | FAD-binding protein | insig. | 34 | 65 |
| | Paraburkholderia graminis OAS925 | ABIE53_003135 | | electron transfer flavoprotein alpha subunit | no data | 39 | 65 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS34140 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 33 | 91 |
| | Sinorhizobium meliloti 1021 | SMa1389 | | EtfA2 electron-transport flavoprotein, alpha-subunit | no data | 34 | 74 |
| | Pseudomonas sp. BP01 | JOY50_RS13730 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 32 | 90 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS31430 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 40 | 63 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS04435 | | electron transfer flavoprotein subunit alpha/FixB family protein | insig. | 35 | 65 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_04285 | | electron transfer flavoprotein alpha subunit apoprotein | no data | 40 | 64 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_2885 | | Electron transfer flavoprotein, alpha subunit | insig. | 40 | 63 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS07620 | | FAD-binding protein | insig. | 38 | 65 |
| | Azospirillum sp. SherDot2 | MPMX19_06152 | | Electron transfer flavoprotein subunit alpha | no data | 38 | 65 |
| | Alteromonas macleodii MIT1002 | MIT1002_02286 | | Electron transfer flavoprotein large subunit | strong | 36 | 65 |
| | Azospirillum sp. SherDot2 | MPMX19_06952 | | Electron transfer flavoprotein subunit alpha | insig. | 39 | 65 |
| | Pseudomonas stutzeri RCH2 | Psest_1706 | | Electron transfer flavoprotein, alpha subunit | no data | 33 | 89 |
| | Sphingobium sp. HT1-2 | GFF4742 | | Electron transfer flavoprotein, alpha subunit | cofit | 40 | 63 |
| | Caulobacter crescentus NA1000 | CCNA_00763 | | electron transfer flavoprotein alpha subunit | no data | 37 | 65 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_00763 | | electron transfer flavoprotein alpha subunit | no data | 37 | 65 |
| | Rhizobium sp. OAE497 | ABIE40_RS17505 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 35 | 72 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS05320 | | FAD-binding protein | strong | 34 | 64 |
| | Xanthobacter sp. DMC5 | GFF4190 | | Electron transfer flavoprotein subunit alpha | insig. | 31 | 89 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS04180 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 40 | 65 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS18705 | | electron transfer flavoprotein subunit alpha/FixB family protein | strong | 40 | 65 |
| | Azospirillum sp. SherDot2 | MPMX19_01358 | | Electron transfer flavoprotein subunit alpha | insig. | 39 | 65 |
| | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS13870 | | electron transfer flavoprotein subunit alpha/FixB family protein | no data | 38 | 65 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS38505 | | FAD-binding protein | insig. | 39 | 64 |
| | Shewanella loihica PV-4 | Shew_2583 | | electron transfer flavoprotein, alpha subunit (RefSeq) | no data | 36 | 64 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS20830 | | electron transfer flavoprotein subunit beta | insig. | 40 | 64 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS14800 | | electron transfer flavoprotein subunit beta | no data | 39 | 65 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS13860 | | electron transfer flavoprotein subunit alpha | no data | 38 | 65 |
| | Azospirillum sp. SherDot2 | MPMX19_00075 | | Electron transfer flavoprotein subunit alpha | insig. | 37 | 65 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF5518 | | Electron transfer flavoprotein, alpha subunit | no data | 40 | 65 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_01255 | fixB | electron transfer flavoprotein subunit alpha | strong | 34 | 64 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS09490 | | electron transfer flavoprotein subunit alpha | no data | 30 | 84 |
| | Marinobacter adhaerens HP15 | HP15_1755 | | electron transfer flavoprotein subunit alpha | no data | 34 | 66 |
| | Escherichia fergusonii Becca | EFB2_02293 | | Protein FixB | insig. | 31 | 76 |
| | Agrobacterium fabrum C58 | Atu3596 | | electron transfer flavoprotein alpha subunit | no data | 41 | 53 |
| | Sphingobium sp. HT1-2 | GFF1705 | | Electron transfer flavoprotein, alpha subunit | no data | 33 | 90 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS13250 | | electron transfer flavoprotein subunit alpha | insig. | 32 | 91 |
| | Pseudomonas putida KT2440 | PP_4201 | | Electron transfer flavoprotein subunit alpha | no data | 32 | 89 |
| | Escherichia coli ECOR38 | HEPCGN_05550 | ydiR | electron transfer flavoprotein subunit alpha | insig. | 29 | 86 |
| | Escherichia coli ECRC100 | OKFHMN_27165 | ydiR | electron transfer flavoprotein subunit alpha | cofit | 29 | 76 |
| | Escherichia coli ECRC101 | MCAODC_18245 | ydiR | electron transfer flavoprotein subunit alpha | insig. | 29 | 76 |
| | Escherichia coli ECRC102 | NIAGMN_00900 | ydiR | electron transfer flavoprotein subunit alpha | insig. | 29 | 76 |
| | Escherichia coli ECRC98 | JDDGAC_01740 | ydiR | electron transfer flavoprotein subunit alpha | insig. | 29 | 76 |
| | Escherichia coli ECRC99 | KEDOAH_00945 | ydiR | electron transfer flavoprotein subunit alpha | no data | 29 | 76 |
| | Azospirillum brasilense Sp245 | AZOBR_RS16915 | | electron transfer flavoprotein subunit beta | insig. | 37 | 65 |