| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Sphingobium sp. HT1-2 | GFF4353 | | Nitrite-sensitive transcriptional repressor NsrR | cofit | 100 | 100 |
| | Sphingobium sp. HT1-2 | GFF1638 | | Nitrite-sensitive transcriptional repressor NsrR | cofit | 49 | 94 |
| | Marinobacter adhaerens HP15 | HP15_2950 | | transcriptional regulator, BadM/Rrf2 family | sig. | 42 | 86 |
| | Kangiella aquimarina DSM 16071 | B158DRAFT_0946 | | transcriptional regulator, BadM/Rrf2 family | strong | 44 | 86 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF1049 | | Nitrite-sensitive transcriptional repressor NsrR | insig. | 48 | 86 |
| | Dickeya dadantii 3937 | DDA3937_RS17265 | | nitric oxide-sensing transcriptional repressor NsrR | sig. | 42 | 86 |
| | Dickeya dianthicola ME23 | DZA65_RS18410 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 42 | 86 |
| | Dickeya dianthicola 67-19 | HGI48_RS17320 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 42 | 86 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF4714 | | Nitrite-sensitive transcriptional repressor NsrR | insig. | 48 | 86 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS08075 | | Rrf2 family transcriptional regulator | insig. | 43 | 85 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS04615 | | Rrf2 family transcriptional regulator | sig. | 42 | 94 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS15190 | | Rrf2 family transcriptional regulator | insig. | 43 | 87 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS09180 | | Rrf2 family transcriptional regulator | insig. | 41 | 95 |
| | Klebsiella michiganensis M5al | BWI76_RS02570 | | transcriptional regulator | strong | 42 | 85 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_1034 | | Nitrite-sensitive transcriptional repressor NsrR | sig. | 45 | 85 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS09195 | | Rrf2 family transcriptional regulator | insig. | 42 | 85 |
| | Ralstonia solanacearum UW163 | UW163_RS04400 | | Rrf2 family transcriptional regulator | insig. | 42 | 85 |
| | Pectobacterium carotovorum WPP14 | HER17_RS03830 | | nitric oxide-sensing transcriptional repressor NsrR | cofit | 41 | 86 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS22375 | | Rrf2 family transcriptional regulator | insig. | 41 | 88 |
| | Rahnella sp. WP5 | EX31_RS08790 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 40 | 89 |
| | Ralstonia solanacearum GMI1000 | RS_RS17025 | | Rrf2 family transcriptional regulator | strong | 41 | 85 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS06700 | | Rrf2 family transcriptional regulator | cofit | 41 | 86 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF831 | | Nitrite-sensitive transcriptional repressor NsrR | insig. | 41 | 85 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_11070 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 41 | 85 |
| | Pantoea sp. MT58 | IAI47_02620 | | nitric oxide-sensing transcriptional repressor NsrR | sig. | 42 | 85 |
| | Pantoea agglomerans CFBP13505 P0401 | PagCFBP13505_RS11215 | | nitric oxide-sensing transcriptional repressor NsrR | cofit | 42 | 85 |
| | Escherichia coli BL21 | ECD_04045 | | nitric oxide-sensitive repressor for NO regulon | sig. | 40 | 86 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_03864 | | HTH-type transcriptional repressor NsrR | insig. | 40 | 86 |
| | Enterobacter sp. TBS_079 | MPMX20_00459 | | HTH-type transcriptional repressor NsrR | strong | 40 | 86 |
| | Acinetobacter baumannii LAC-4 | RR41_RS02130 | | Rrf2 family transcriptional regulator | sig. | 37 | 89 |
| | Escherichia fergusonii Becca | EFB2_04357 | | HTH-type transcriptional repressor NsrR | sig. | 40 | 86 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS24260 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 40 | 86 |
| | Escherichia coli BW25113 | b4178 | yjeB | predicted DNA-binding transcriptional regulator (NCBI) | strong | 40 | 86 |
| | Sinorhizobium meliloti 1021 | SMc00785 | | iron-responsive transcriptional regulator | no data | 40 | 85 |
| | Serratia liquefaciens MT49 | IAI46_01655 | | nitric oxide-sensing transcriptional repressor NsrR | insig. | 40 | 85 |
| | Escherichia coli ECRC62 | BNILDI_07000 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | cofit | 40 | 86 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_3375 | | transcriptional regulator, BadM/Rrf2 family | insig. | 40 | 86 |
| | Escherichia coli ECOR27 | NOLOHH_04490 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | cofit | 40 | 86 |
| | Escherichia coli ECOR38 | HEPCGN_10455 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | cofit | 40 | 86 |
| | Escherichia coli ECRC100 | OKFHMN_12225 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | cofit | 40 | 86 |
| | Escherichia coli ECRC102 | NIAGMN_10075 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | cofit | 40 | 86 |
| | Escherichia coli ECRC98 | JDDGAC_15865 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | sig. | 40 | 86 |
| | Escherichia coli ECRC99 | KEDOAH_15930 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | no data | 40 | 86 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS08875 | | Rrf2 family transcriptional regulator | insig. | 44 | 87 |
| | Escherichia coli ECRC101 | MCAODC_02740 | nsrR | nitric oxide-sensing transcriptional repressor NsrR | sig. | 39 | 86 |
| | Shewanella sp. ANA-3 | Shewana3_0047 | | BadM/Rrf2 family transcriptional regulator (RefSeq) | no data | 39 | 85 |
| | Phaeobacter inhibens DSM 17395 | PGA1_78p00090 | | putative HTH-type transcriptional regulator | no data | 37 | 85 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_00816 | | transcriptional regulator, BadM/Rrf2 family | insig. | 40 | 99 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS08985 | | Rrf2 family transcriptional regulator | insig. | 39 | 84 |
| | Paraburkholderia graminis OAS925 | ABIE53_002032 | | Rrf2 family nitric oxide-sensitive transcriptional repressor | strong | 38 | 99 |
| | Shewanella oneidensis MR-1 | SO0045 | | Rrf2 family protein (NCBI ptt file) | insig. | 38 | 85 |
| | Shewanella amazonensis SB2B | Sama_0056 | | Rrf2 family protein (RefSeq) | insig. | 40 | 85 |
| | Rhizobium sp. OAE497 | ABIE40_RS03340 | | iron-responsive transcriptional regulator RirA | strong | 38 | 85 |
| | Agrobacterium fabrum C58 | Atu0201 | | hypothetical protein | strong | 38 | 85 |
| | Shewanella loihica PV-4 | Shew_3810 | | BadM/Rrf2 family transcriptional regulator (RefSeq) | insig. | 36 | 95 |
| | Acinetobacter radioresistens SK82 | MPMX26_02726 | | HTH-type transcriptional repressor NsrR | strong | 33 | 91 |
| | Dinoroseobacter shibae DFL-12 | Dshi_1660 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | sig. | 37 | 88 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS06520 | | transcriptional regulator | cofit | 37 | 85 |
| | Dinoroseobacter shibae DFL-12 | Dshi_2306 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | insig. | 42 | 84 |
| | Phaeobacter inhibens DSM 17395 | PGA1_c26400 | | putative HTH-type transcriptional regulator | insig. | 35 | 82 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF5821 | | Nitrite-sensitive transcriptional repressor NsrR | insig. | 41 | 90 |
| o | Desulfovibrio vulgaris Hildenborough JW710 | DVU0529 | rrf2 | Rrf2 protein (voordouw) | strong | 34 | 88 |
| | Sphingobium sp. HT1-2 | GFF975 | | Iron-sulfur cluster regulator IscR | cofit | 33 | 84 |
| | Agrobacterium fabrum C58 | Atu3668 | | siderophore biosynthesis protein | insig. | 34 | 85 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2591 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | strong | 32 | 88 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS05565 | | transcriptional regulator BadM/Rrf2 family (fragment) | no data | 30 | 98 |
| | Agrobacterium fabrum C58 | Atu4299 | | hypothetical protein | insig. | 33 | 84 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.1701.1 | | Iron-sulfur cluster regulator IscR | no data | 33 | 78 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS12005 | | Rrf2 family transcriptional regulator | no data | 29 | 84 |
| | Lysobacter sp. OAE881 | ABIE51_RS15725 | | SUF system Fe-S cluster assembly regulator | insig. | 32 | 89 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0623 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | insig. | 32 | 85 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS04700 | | SUF system Fe-S cluster assembly regulator | no data | 30 | 99 |
| | Pedobacter sp. GW460-11-11-14-LB5 | CA265_RS04090 | | transcriptional regulator | no data | 27 | 93 |
| | Synechococcus elongatus PCC 7942 | Synpcc7942_2585 | | transcriptional regulator, BadM/Rrf2 family | sig. | 36 | 91 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_1470 | | transcriptional regulator, BadM/Rrf2 family | no data | 32 | 86 |
| | Enterobacter sp. TBS_079 | MPMX20_02372 | | HTH-type transcriptional repressor NsrR | sig. | 29 | 76 |
| | Azospirillum brasilense Sp245 | AZOBR_RS19255 | | Rrf2 family transcriptional regulator | no data | 32 | 84 |
| | Agrobacterium fabrum C58 | Atu0819 | | hypothetical protein | sig. | 32 | 82 |
| | Rhizobium sp. OAE497 | ABIE40_RS02460 | | Rrf2 family transcriptional regulator | cofit | 29 | 91 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_17985 | | hypothetical protein | insig. | 36 | 84 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU1967 | rrf2 | transcriptional regulator, rrf2 protein, putative (TIGR) | sig. | 32 | 85 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_2132 | | transcriptional regulator, BadM/Rrf2 family | strong | 33 | 83 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_09970 | iscR | SUF system Fe-S cluster assembly regulator | insig. | 30 | 90 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_1100 | | transcriptional regulator, BadM/Rrf2 family | insig. | 29 | 76 |
| | Azospirillum sp. SherDot2 | MPMX19_04817 | | HTH-type transcriptional repressor NsrR | no data | 32 | 84 |
| | Rhizobium sp. OAE497 | ABIE40_RS04485 | | Rrf2 family transcriptional regulator | insig. | 30 | 82 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS03100 | | SUF system Fe-S cluster assembly regulator | no data | 29 | 85 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS02850 | | SUF system Fe-S cluster assembly regulator | no data | 29 | 85 |
| | Caulobacter crescentus NA1000 | CCNA_02708 | | Rrf2 family protein | strong | 33 | 89 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_02708 | | Rrf2 family protein | cofit | 33 | 89 |
| | Azospirillum sp. SherDot2 | MPMX19_04829 | | Putative HTH-type transcriptional regulator | no data | 27 | 85 |
| | Synechocystis sp000284455 PCC 6803 | SGL_RS15215 | | RrF2 family transcriptional regulator | strong | 32 | 91 |
| | Dinoroseobacter shibae DFL-12 | Dshi_1633 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | no data | 38 | 56 |
| | Dyella japonica UNC79MFTsu3.2 | ABZR86_RS09485 | | SUF system Fe-S cluster assembly regulator | insig. | 29 | 86 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS06870 | | SUF system Fe-S cluster assembly regulator | insig. | 28 | 85 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0622 | | transcriptional regulator, BadM/Rrf2 family (RefSeq) | insig. | 30 | 85 |
| | Serratia liquefaciens MT49 | IAI46_18835 | | Rrf2 family transcriptional regulator | no data | 27 | 95 |
| | Pseudomonas sp. BP01 | JOY50_RS07645 | | Rrf2 family transcriptional regulator | insig. | 36 | 65 |
| | Dechlorosoma suillum PS | Dsui_2369 | | iron-sulfur cluster assembly transcription factor IscR | strong | 27 | 92 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_03880 | | HTH-type transcriptional regulator IscR | insig. | 30 | 68 |