| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Enterobacter sp. TBS_079 | MPMX20_03593 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 100 | 100 |
| o | Enterobacter asburiae PDN3 | EX28DRAFT_2798 | | Transcriptional regulator containing GAF, AAA-type ATPase, and DNA binding domains | insig. | 93 | 100 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS15110 | | nitric oxide reductase transcriptional regulator NorR | no data | 85 | 100 |
| o | Escherichia coli Nissle 1917 | ECOLIN_RS26155 | | nitric oxide reductase transcriptional regulator NorR | no data | 85 | 100 |
| o | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF4703 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 84 | 100 |
| o | Escherichia coli ECRC100 | OKFHMN_20650 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECRC101 | MCAODC_11175 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECRC102 | NIAGMN_18420 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECRC98 | JDDGAC_24315 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECRC99 | KEDOAH_07485 | norR | nitric oxide reductase transcriptional regulator NorR | no data | 85 | 100 |
| o | Escherichia fergusonii Becca | EFB2_01215 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECOR27 | NOLOHH_12495 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli BL21 | ECD_02559 | | anaerobic nitric oxide reductase DNA-binding transcriptional activator | cofit | 85 | 100 |
| o | Escherichia coli BW25113 | b2709 | ygaA | putative 2-component transcriptional regulator (VIMSS) | insig. | 85 | 100 |
| o | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01025 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECOR38 | HEPCGN_19850 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 85 | 100 |
| o | Escherichia coli ECRC62 | BNILDI_11055 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 84 | 100 |
| o | Klebsiella michiganensis M5al | BWI76_RS22250 | | nitric oxide reductase transcription regulator | insig. | 78 | 100 |
| o | Klebsiella pneumoniae MKP103 | KDGMDA_02920 | | nitric oxide reductase transcriptional regulator NorR | sig. | 78 | 100 |
| o | Pectobacterium carotovorum WPP14 | HER17_RS17125 | | nitric oxide reductase transcriptional regulator NorR | insig. | 68 | 100 |
| o | Dickeya dadantii 3937 | DDA3937_RS04535 | | nitric oxide reductase transcriptional regulator NorR | insig. | 65 | 100 |
| o | Dickeya dianthicola 67-19 | HGI48_RS04495 | | nitric oxide reductase transcriptional regulator NorR | insig. | 66 | 100 |
| o | Dickeya dianthicola ME23 | DZA65_RS04415 | | nitric oxide reductase transcriptional regulator NorR | insig. | 65 | 100 |
| o | Shewanella loihica PV-4 | Shew_0656 | | anaerobic nitric oxide reductase transcription regulator (RefSeq) | insig. | 62 | 100 |
| o | Shewanella sp. ANA-3 | Shewana3_0845 | | anaerobic nitric oxide reductase transcription regulator (RefSeq) | insig. | 60 | 100 |
| o | Shewanella amazonensis SB2B | Sama_0727 | | anaerobic nitric oxide reductase transcription regulator (RefSeq) | insig. | 60 | 100 |
| o | Pseudomonas sp. DMC3 | GFF4398 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 50 | 99 |
| o | Pseudomonas fluorescens FW300-N2E3 | AO353_15435 | | transcriptional regulator | insig. | 51 | 95 |
| o | Pseudomonas fluorescens GW456-L13 | PfGW456L13_4939 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 51 | 99 |
| o | Pseudomonas sp. SVBP6 | COO64_RS11340 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 50 | 98 |
| o | Pseudomonas simiae WCS417 | PS417_23405 | | transcriptional regulator | insig. | 51 | 99 |
| o | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_926 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 51 | 95 |
| o | Pseudomonas lactucae CFBP13502 | GEMAOFIL_04828 | | Nitric oxide reductase transcription regulator NorR2 | cofit | 51 | 99 |
| o | Pseudomonas fluorescens SBW25 | PFLU_RS25235 | | nitric oxide reductase transcriptional regulator NorR | insig. | 51 | 99 |
| o | Pseudomonas fluorescens SBW25-INTG | PFLU_RS25235 | | nitric oxide reductase transcriptional regulator NorR | insig. | 51 | 99 |
| o | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_5314 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 51 | 99 |
| o | Burkholderia phytofirmans PsJN | BPHYT_RS30560 | | transcriptional regulator | insig. | 51 | 99 |
| o | Pseudomonas sp. BP01 | JOY50_RS23015 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 49 | 98 |
| o | Vibrio cholerae E7946 ATCC 55056 | CSW01_14900 | | regulatory protein LuxO | insig. | 49 | 99 |
| o | Pseudomonas putida KT2440 | PP_0807 | | DNA-binding transcriptional dual regulator (NO) | insig. | 50 | 97 |
| o | Paraburkholderia sabiae LMG 24235 | QEN71_RS15700 | | nitric oxide reductase transcriptional regulator NorR | insig. | 50 | 99 |
| o | Pseudomonas fluorescens FW300-N2C3 | AO356_16945 | | transcriptional regulator | insig. | 51 | 99 |
| o | Pseudomonas sp. RS175 | PFR28_00239 | | Nitric oxide reductase transcription regulator NorR2 | insig. | 51 | 99 |
| o | Pseudomonas aeruginosa PA14 | IKLFDK_13385 | | nitric oxide reductase transcriptional regulator NorR | insig. | 50 | 99 |
| o | Herbaspirillum seropedicae SmR1 | HSERO_RS12530 | | transcriptional regulator | insig. | 49 | 99 |
| o | Pseudomonas sp. S08-1 | OH686_12120 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 52 | 97 |
| o | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF5813 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | no data | 51 | 95 |
| o | Pseudomonas segetis P6 | MPMX49_01763 | | Nitric oxide reductase transcription regulator NorR2 | insig. | 50 | 92 |
| o | Acidovorax sp. GW101-3H11 | Ac3H11_3315 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 48 | 99 |
| o | Variovorax sp. OAS795 | ABID97_RS27095 | | nitric oxide reductase transcriptional regulator NorR | no data | 47 | 97 |
| o | Alteromonas macleodii MIT1002 | MIT1002_03245 | | Regulatory protein LuxO | insig. | 46 | 98 |
| o | Azospirillum sp. SherDot2 | MPMX19_06071 | | Nitric oxide reductase transcription regulator NorR2 | insig. | 50 | 93 |
| | Pseudomonas sp. RS175 | PFR28_02218 | | Nitric oxide reductase transcription regulator NorR2 | sig. | 48 | 98 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF4519 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 50 | 95 |
| o | Ralstonia solanacearum GMI1000 | RS_RS21740 | | nitric oxide reductase transcriptional regulator NorR | insig. | 51 | 95 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_717 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | strong | 47 | 98 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_25140 | | transcriptional regulator | sig. | 47 | 98 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_5751 | | Functional role page for Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 47 | 98 |
| o | Pseudomonas stutzeri RCH2 | Psest_0833 | | Transcriptional regulator containing GAF, AAA-type ATPase, and DNA binding domains | sig. | 47 | 100 |
| | Pseudomonas sp. SVBP6 | COO64_RS14170 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 47 | 98 |
| o | Cupriavidus basilensis FW507-4G11 | RR42_RS08835 | | transcriptional regulator | insig. | 48 | 95 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_22030 | | transcriptional regulator | insig. | 47 | 98 |
| o | Castellaniella sp019104865 MT123 | ABCV34_RS05900 | | nitric oxide reductase transcriptional regulator NorR | cofit | 45 | 99 |
| | Dickeya dadantii 3937 | DDA3937_RS18805 | | nif-specific transcriptional activator NifA | insig. | 48 | 64 |
| | Rahnella sp. WP5 | EX31_RS15395 | | nif-specific transcriptional activator NifA | insig. | 47 | 69 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2359 | | sigma-54 dependent transcriptional regulator (TIGR) | insig. | 51 | 57 |
| | Dickeya dianthicola ME23 | DZA65_RS19920 | | nif-specific transcriptional activator NifA | insig. | 47 | 64 |
| | Dickeya dianthicola 67-19 | HGI48_RS18785 | | nif-specific transcriptional activator NifA | insig. | 47 | 64 |
| | Dickeya dianthicola ME23 | DZA65_RS07775 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 43 | 73 |
| | Escherichia coli ECRC62 | BNILDI_12310 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 44 | 72 |
| | Dickeya dianthicola 67-19 | HGI48_RS07265 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 42 | 73 |
| | Escherichia coli BW25113 | b2491 | hyfR | putative 2-component regulator, interaction with sigma 54 (VIMSS) | sig. | 44 | 72 |
| | Escherichia coli BL21 | ECD_02383 | | hydrogenase-4 transcriptional activator | cofit | 44 | 72 |
| | Escherichia coli ECRC100 | OKFHMN_21850 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 44 | 72 |
| | Escherichia coli ECRC101 | MCAODC_12380 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 44 | 72 |
| | Escherichia coli ECRC102 | NIAGMN_19620 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 44 | 72 |
| | Escherichia coli ECRC98 | JDDGAC_25795 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 44 | 72 |
| | Escherichia coli ECRC99 | KEDOAH_06370 | hyfR | DNA-binding transcriptional regulator HyfR | no data | 44 | 72 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01235 | | DNA-binding transcriptional activator HyfR | cofit | 44 | 72 |
| | Dickeya dadantii 3937 | DDA3937_RS07400 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 42 | 73 |
| | Azospirillum brasilense Sp245 | AZOBR_RS29300 | | Fis family transcriptional regulator | insig. | 46 | 63 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF4725 | | Formate hydrogenlyase transcriptional activator | insig. | 40 | 81 |
| | Escherichia coli ECOR38 | HEPCGN_21015 | hyfR | DNA-binding transcriptional activator HyfR | insig. | 47 | 63 |
| | Escherichia coli ECOR27 | NOLOHH_13500 | | Fis family transcriptional regulator | insig. | 47 | 61 |
| | Klebsiella michiganensis M5al | BWI76_RS18890 | | nif-specific transcriptional activator NifA | sig. | 48 | 60 |
| | Rahnella sp. WP5 | EX31_RS19870 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 45 | 61 |
| | Rhodospirillum rubrum S1H | Rru_A1388 | | Transcriptional Regulator, NifA subfamily, Fis Family (NCBI) | cofit | 48 | 60 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2149 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 55 | 54 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_03040 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 44 | 64 |
| | Bosea sp. OAE506 | ABIE41_RS06250 | | sigma 54-interacting transcriptional regulator | insig. | 55 | 47 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_2822 | | Transcriptional regulator containing GAF, AAA-type ATPase, and DNA binding domains | insig. | 40 | 81 |
| | Methylophilus sp. DMC18 | GFF2815 | | Regulatory protein AtoC | insig. | 44 | 69 |
| | Serratia liquefaciens MT49 | IAI46_12570 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 41 | 78 |
| | Enterobacter sp. TBS_079 | MPMX20_03616 | | Formate hydrogenlyase transcriptional activator | insig. | 39 | 81 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_1461 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | no data | 56 | 47 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0823 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 46 | 70 |
| | Escherichia coli ECRC100 | OKFHMN_20540 | flhA | formate hydrogenlyase transcriptional activator FlhA | insig. | 39 | 81 |
| | Escherichia coli ECRC101 | MCAODC_11065 | flhA | formate hydrogenlyase transcriptional activator FlhA | insig. | 39 | 81 |
| | Escherichia coli ECRC102 | NIAGMN_18310 | flhA | formate hydrogenlyase transcriptional activator FlhA | insig. | 39 | 81 |
| | Escherichia coli ECRC98 | JDDGAC_24205 | flhA | formate hydrogenlyase transcriptional activator FlhA | insig. | 39 | 81 |