| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Azospirillum sp. SherDot2 | MPMX19_05940 | | Anaerobic regulatory protein | insig. | 100 | 100 |
| o | Rhodospirillum rubrum S1H | Rru_A1622 | | Transcriptional Regulator, Crp/Fnr family (NCBI) | insig. | 56 | 97 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS30865 | | Crp/Fnr family transcriptional regulator | insig. | 56 | 97 |
| o | Magnetospirillum magneticum AMB-1 | AMB_RS16980 | | Crp/Fnr family transcriptional regulator | cofit | 55 | 97 |
| | Azospirillum sp. SherDot2 | MPMX19_00212 | | Nitrogen fixation regulation protein FixK | cofit | 30 | 92 |
| | Azospirillum brasilense Sp245 | AZOBR_RS01145 | | Crp/Fnr family transcriptional regulator | cofit | 30 | 92 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS31300 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 88 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS16020 | | transcriptional regulator | no data | 29 | 93 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS17975 | | helix-turn-helix domain-containing protein | strong | 28 | 88 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS22105 | | transcriptional regulator | insig. | 29 | 100 |
| | Echinicola vietnamensis KMM 6221, DSM 17526 | Echvi_2881 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | sig. | 25 | 83 |
| | Pantoea agglomerans CFBP13505 P0401 | PagCFBP13505_RS06575 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 27 | 83 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS09585 | | Crp/Fnr family transcriptional regulator | insig. | 28 | 84 |
| | Erwinia amylovora T8 | OLJFJH_13925 | | transcriptional regulator FNR | sig. | 27 | 83 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS20035 | | helix-turn-helix domain-containing protein | insig. | 32 | 77 |
| | Pseudomonas sp. RS175 | PFR28_02314 | | Fumarate and nitrate reduction regulatory protein | insig. | 31 | 84 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS12690 | | transcriptional regulator | strong | 27 | 92 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_07190 | | transcriptional regulator FNR | strong | 26 | 83 |
| | Pseudomonas sp. RS175 | PFR28_01975 | | Fumarate and nitrate reduction regulatory protein | no data | 31 | 83 |
| | Pantoea sp. MT58 | IAI47_09580 | | FNR family transcription factor | strong | 27 | 83 |
| | Azospirillum brasilense Sp245 | AZOBR_RS17340 | | hypothetical protein | insig. | 30 | 84 |
| | Rhodospirillum rubrum S1H | Rru_A3322 | | Transcriptional Regulator, Crp/Fnr family (NCBI) | cofit | 28 | 93 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_01640 | | transcriptional regulator, Crp/Fnr family | sig. | 25 | 92 |
| | Dickeya dadantii 3937 | DDA3937_RS10950 | | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 26 | 83 |
| | Dickeya dianthicola 67-19 | HGI48_RS10900 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 26 | 83 |
| | Dickeya dianthicola ME23 | DZA65_RS11360 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 26 | 83 |
| | Erwinia tracheiphila HP pepo 2.2 | IJEDHG_23150 | crp | transcriptional regulator FNR | insig. | 26 | 83 |
| | Erwinia tracheiphila SCR3 | LU632_RS11420 | | FNR family transcription factor | insig. | 26 | 83 |
| | Ralstonia solanacearum GMI1000 | RS_RS00940 | | Crp/Fnr family transcriptional regulator | strong | 29 | 70 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS02015 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 84 |
| | Ralstonia solanacearum UW163 | UW163_RS15340 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 84 |
| | Rahnella sp. WP5 | EX31_RS07200 | | FNR family transcription factor | cofit | 26 | 83 |
| | Enterobacter sp. TBS_079 | MPMX20_02035 | | Fumarate and nitrate reduction regulatory protein | strong | 26 | 83 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_1540 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | cofit | 26 | 83 |
| | Escherichia coli ECRC98 | JDDGAC_04785 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia fergusonii Becca | EFB2_02593 | | Fumarate and nitrate reduction regulatory protein | sig. | 26 | 83 |
| | Escherichia coli ECOR27 | NOLOHH_19940 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia coli ECOR38 | HEPCGN_25925 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia coli ECRC100 | OKFHMN_02240 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia coli ECRC101 | MCAODC_16030 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | sig. | 26 | 83 |
| | Escherichia coli ECRC102 | NIAGMN_26410 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia coli ECRC62 | BNILDI_18090 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 26 | 83 |
| | Escherichia coli ECRC99 | KEDOAH_26530 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | no data | 26 | 83 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_02348 | | Fumarate and nitrate reduction regulatory protein | insig. | 26 | 83 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS08005 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 83 |
| | Escherichia coli BW25113 | b1334 | fnr | DNA-binding transcriptional dual regulator, global regulator of anaerobic growth (NCBI) | strong | 26 | 83 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2656 | | Fumarate and nitrate reduction regulatory protein | sig. | 26 | 83 |
| | Cellulophaga baltica 18 | M666_RS07170 | | Crp/Fnr family transcriptional regulator | insig. | 26 | 70 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF4142 | | transcriptional regulator, Crp/Fnr family | insig. | 25 | 83 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_23940 | | Crp/Fnr family transcriptional regulator | insig. | 28 | 92 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_1516 | | transcriptional regulator, Crp/Fnr family | insig. | 28 | 92 |
| | Paraburkholderia graminis OAS925 | ABIE53_004332 | | CRP/FNR family transcriptional regulator | sig. | 27 | 78 |
| | Klebsiella michiganensis M5al | BWI76_RS16185 | | transcriptional regulator FNR | no data | 26 | 83 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS21215 | | Crp/Fnr family transcriptional regulator | strong | 29 | 78 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_21005 | | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 26 | 83 |
| | Pectobacterium carotovorum WPP14 | HER17_RS10525 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 26 | 83 |
| | Shewanella oneidensis MR-1 | SO2356 | etrA | electron transport regulator a (NCBI ptt file) | strong | 25 | 70 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS11900 | | Crp/Fnr family transcriptional regulator | insig. | 27 | 99 |
| | Shewanella sp. ANA-3 | Shewana3_2115 | | fumarate/nitrate reduction transcriptional regulator (RefSeq) | no data | 25 | 70 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS05625 | | response regulator | insig. | 27 | 70 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS15200 | | Crp/Fnr family transcriptional regulator | insig. | 31 | 70 |
| | Serratia liquefaciens MT49 | IAI46_13260 | | FNR family transcription factor | cofit | 26 | 83 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_00820 | | CRP-like protein Clp | insig. | 27 | 91 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_19870 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 92 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_4177 | | transcriptional regulator, Crp/Fnr family | insig. | 27 | 92 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS09000 | | response regulator | insig. | 26 | 78 |
| | Sinorhizobium meliloti 1021 | SMa1245 | | Crp/fnr-like transcriptional regulator | insig. | 29 | 78 |
| | Pseudomonas sp. DMC3 | GFF3609 | | Anaerobic regulatory protein | cofit | 29 | 83 |
| | Agrobacterium fabrum C58 | Atu4380 | | Crp family transcriptional regulator | insig. | 27 | 89 |
| | Shewanella amazonensis SB2B | Sama_1799 | | fumarate/nitrate reduction transcriptional regulator (RefSeq) | sig. | 25 | 70 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS36970 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 27 | 84 |
| | Shewanella loihica PV-4 | Shew_1993 | | fumarate/nitrate reduction transcriptional regulator (RefSeq) | no data | 25 | 70 |
| | Dechlorosoma suillum PS | Dsui_1646 | | cAMP-binding protein | strong | 25 | 97 |
| | Sphingobium sp. HT1-2 | GFF3049 | | Transcriptional regulator, Crp/Fnr family | cofit | 26 | 83 |
| | Kangiella aquimarina DSM 16071 | B158DRAFT_1982 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | sig. | 27 | 83 |
| | Pseudomonas simiae WCS417 | PS417_15825 | | Crp/Fnr family transcriptional regulator | insig. | 27 | 92 |
| | Sinorhizobium meliloti 1021 | SMa1141 | | FNR/CRP family transcriptional regulator | insig. | 31 | 78 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS14515 | | cyclic nucleotide-binding domain-containing protein | insig. | 27 | 84 |
| | Methylophilus sp. DMC18 | GFF1089 | | Transcriptional activator protein Anr | insig. | 24 | 85 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS13815 | | cyclic nucleotide-binding domain-containing protein | strong | 27 | 84 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS14095 | | cyclic nucleotide-binding domain-containing protein | strong | 27 | 84 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_975 | | transcriptional regulator, Crp/Fnr family | no data | 24 | 92 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.2952.1 | | transcriptional regulator, Crp/Fnr family | sig. | 29 | 92 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS12875 | | transcriptional regulator | insig. | 25 | 91 |
| | Azospirillum sp. SherDot2 | MPMX19_03014 | | Transcriptional activatory protein AadR | insig. | 30 | 76 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_07375 | | transcriptional regulator Anr | strong | 26 | 84 |
| | Ralstonia solanacearum UW163 | UW163_RS13110 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 28 | 81 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS15650 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 28 | 81 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS17705 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 28 | 81 |
| | Cellulophaga baltica 18 | M666_RS11820 | | response regulator | sig. | 25 | 72 |
| | Pseudomonas putida KT2440 | PP_3287 | | transcriptional regulator with 4Fe-4S cluster; Crp/Fnr family | sig. | 28 | 73 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS06835 | | helix-turn-helix domain-containing protein | strong | 26 | 79 |
| | Ralstonia solanacearum GMI1000 | RS_RS06430 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 27 | 81 |
| | Bosea sp. OAE506 | ABIE41_RS04120 | | Crp/Fnr family transcriptional regulator | insig. | 27 | 83 |
| | Rhodospirillum rubrum S1H | Rru_A1787 | | Cyclic nucleotide-binding domain (cNMP-BD) protein (NCBI) | insig. | 24 | 96 |
| | Sphingobium sp. HT1-2 | GFF4341 | | hypothetical protein | insig. | 26 | 83 |
| | Rhodopseudomonas palustris CGA009 | TX73_021475 | | Crp/Fnr family transcriptional regulator | insig. | 25 | 80 |
| | Azospirillum brasilense Sp245 | AZOBR_RS23090 | | Crp/Fnr family transcription regulator | insig. | 30 | 76 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_13900 | | transcriptional regulator | sig. | 27 | 70 |
| | Pseudomonas sp. BP01 | JOY50_RS00125 | fnrA | Crp/Fnr family transcriptional regulator FnrA | insig. | 26 | 84 |