| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_2380 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 100 | 100 |
| o | Pseudomonas fluorescens FW300-N2C3 | AO356_02780 | | nitrate reductase | insig. | 98 | 100 |
| o | Pseudomonas sp. RS175 | PFR28_01047 | | Nitrate reductase | insig. | 94 | 100 |
| o | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_3835 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 91 | 100 |
| o | Pseudomonas fluorescens FW300-N2E3 | AO353_00815 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 89 | 100 |
| o | Pseudomonas sp. DMC3 | GFF5245 | | Nitrate reductase | strong | 88 | 100 |
| o | Pseudomonas fluorescens GW456-L13 | PfGW456L13_4103 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 87 | 100 |
| o | Pseudomonas syringae pv. syringae B728a | Psyr_2099 | | assimilatory nitrate reductase (NADH) alpha subunit apoprotein | insig. | 77 | 99 |
| o | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_2099 | | assimilatory nitrate reductase (NADH) alpha subunit apoprotein | insig. | 77 | 99 |
| o | Pseudomonas stutzeri RCH2 | Psest_1926 | | Uncharacterized anaerobic dehydrogenase | strong | 77 | 100 |
| o | Pseudomonas aeruginosa PA14 | IKLFDK_08600 | | nitrate reductase | insig. | 76 | 99 |
| o | Pseudomonas sp. S08-1 | OH686_00500 | | Assimilatory nitrate reductase large subunit | cofit | 76 | 99 |
| o | Pseudomonas segetis P6 | MPMX49_02614 | | Periplasmic nitrate reductase | insig. | 72 | 99 |
| o | Methylophilus sp. DMC18 | GFF201 | | Periplasmic nitrate reductase | cofit | 57 | 99 |
| o | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF3663 | | Assimilatory nitrate reductase large subunit (EC:1.7.99.4) | insig. | 55 | 99 |
| o | Acidovorax sp. GW101-3H11 | Ac3H11_3239 | | Assimilatory nitrate reductase large subunit (EC:1.7.99.4) | insig. | 54 | 99 |
| o | Dechlorosoma suillum PS | Dsui_1817 | | anaerobic dehydrogenase, typically selenocysteine-containing | cofit | 54 | 99 |
| o | Variovorax sp. SCN45 | GFF4731 | | Assimilatory nitrate reductase large subunit (EC 1.7.99.4) | insig. | 54 | 99 |
| o | Variovorax sp. OAS795 | ABID97_RS20605 | | molybdopterin-dependent oxidoreductase | insig. | 53 | 99 |
| o | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.2710.1 | | Assimilatory nitrate reductase large subunit (EC:1.7.99.4) | insig. | 53 | 98 |
| | Echinicola vietnamensis KMM 6221, DSM 17526 | Echvi_1912 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 48 | 78 |
| | Cellulophaga baltica 18 | M666_RS04525 | | nitrate reductase | insig. | 47 | 79 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS16935 | | nitrate reductase | strong | 46 | 79 |
| o | Dyella japonica UNC79MFTsu3.2 | ABZR86_RS03865 | | Nitrate reductase (EC 1.7.99.4) (from data) | cofit | 43 | 98 |
| | Pedobacter sp. GW460-11-11-14-LB5 | CA265_RS10015 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 46 | 77 |
| o | Herbaspirillum seropedicae SmR1 | HSERO_RS14550 | | nitrate reductase | strong | 42 | 98 |
| o | Ralstonia sp. UNC404CL21Col | ABZR87_RS18885 | | nitrate reductase | strong | 42 | 98 |
| o | Cupriavidus basilensis FW507-4G11 | RR42_RS31800 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 42 | 98 |
| o | Magnetospirillum magneticum AMB-1 | AMB_RS02735 | | nitrate reductase | no data | 43 | 99 |
| o | Ralstonia solanacearum PSI07 | RPSI07_RS05595 | | nitrate reductase | insig. | 42 | 98 |
| o | Agrobacterium fabrum C58 | Atu3900 | | nitrate reductase large subunit | insig. | 41 | 98 |
| o | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS18010 | | nitrate reductase | insig. | 42 | 98 |
| o | Ralstonia solanacearum UW163 | UW163_RS21120 | | nitrate reductase | insig. | 42 | 98 |
| o | Ralstonia solanacearum GMI1000 | RS_RS23020 | | nitrate reductase | insig. | 41 | 98 |
| | Pectobacterium carotovorum WPP14 | HER17_RS07335 | | nitrate reductase | cofit | 48 | 79 |
| o | Sinorhizobium meliloti 1021 | SM_b20986 | | Nitrate reductase (EC 1.7.99.4) (from data) | sig. | 42 | 98 |
| o | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_00665 | | assimilatory nitrate reductase (NADH) alpha subunit apoprotein (EC 1.7.1.1) | sig. | 40 | 99 |
| o | Paraburkholderia graminis OAS925 | ABIE53_001856 | | assimilatory nitrate reductase catalytic subunit | sig. | 40 | 98 |
| o | Rahnella sp. WP5 | EX31_RS09105 | | nitrate reductase | insig. | 41 | 99 |
| o | Caulobacter crescentus NA1000 | CCNA_00653 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 43 | 98 |
| o | Caulobacter crescentus NA1000 Δfur | CCNA_00653 | | assimilatory nitrate reductase catalytic subunit | cofit | 43 | 98 |
| o | Klebsiella michiganensis M5al | BWI76_RS17360 | | nitrate reductase | sig. | 41 | 98 |
| o | Rhizobium sp. OAE497 | ABIE40_RS25570 | | nitrate reductase | insig. | 42 | 98 |
| o | Dickeya dianthicola 67-19 | HGI48_RS14085 | | nitrate reductase | insig. | 40 | 99 |
| o | Dickeya dadantii 3937 | DDA3937_RS14085 | | nitrate reductase | insig. | 40 | 99 |
| o | Dickeya dianthicola ME23 | DZA65_RS14745 | | nitrate reductase | insig. | 40 | 99 |
| o | Acinetobacter baumannii LAC-4 | RR41_RS07890 | | nitrate reductase | insig. | 38 | 99 |
| o | Alteromonas macleodii MIT1002 | MIT1002_00700 | | Nitrate reductase | insig. | 37 | 99 |
| o | Acinetobacter radioresistens SK82 | MPMX26_01572 | | Nitrate reductase | no data | 39 | 98 |
| o | Sphingobium sp. HT1-2 | GFF1181 | | Assimilatory nitrate reductase large subunit (EC 1.7.99.4) | cofit | 40 | 99 |
| o | Dinoroseobacter shibae DFL-12 | Dshi_1669 | | Nitrate reductase (EC 1.7.99.4) (from data) | sig. | 41 | 100 |
| | Synechocystis sp000284455 PCC 6803 | SGL_RS06575 | | nitrate reductase | no data | 44 | 77 |
| o | Enterobacter sp. TBS_079 | MPMX20_02620 | | Nitrate reductase | insig. | 40 | 98 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_0846 | | Anaerobic dehydrogenases, typically selenocysteine-containing | insig. | 46 | 78 |
| | Synechococcus elongatus PCC 7942 | Synpcc7942_1235 | narB | assimilatory nitrate reductase (ferredoxin) precursor | no data | 44 | 77 |
| o | Klebsiella pneumoniae MKP103 | KDGMDA_24585 | | nitrate reductase | insig. | 39 | 98 |
| o | Pantoea sp. MT58 | IAI47_11165 | | nitrate reductase | cofit | 45 | 77 |
| o | Bosea sp. OAE506 | ABIE41_RS21320 | | molybdopterin-dependent oxidoreductase | insig. | 39 | 99 |
| o | Xanthobacter sp. DMC5 | GFF1981 | | Nitrate reductase | strong | 39 | 99 |
| o | Azospirillum sp. SherDot2 | MPMX19_05928 | | Nitrate reductase | insig. | 39 | 98 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS16720 | | bifunctional nitrate reductase/sulfite reductase flavoprotein subunit alpha | insig. | 42 | 78 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS16720 | | bifunctional nitrate reductase/sulfite reductase flavoprotein subunit alpha | strong | 42 | 78 |
| | Pseudomonas simiae WCS417 | PS417_14735 | | Nitrate reductase (EC 1.7.99.4) (from data) | strong | 41 | 78 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS37800 | | sulfite reductase subunit alpha | insig. | 41 | 77 |
| | Pseudomonas sp. SVBP6 | COO64_RS07080 | | bifunctional nitrate reductase/sulfite reductase flavoprotein subunit alpha | insig. | 41 | 78 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS09850 | | molybdopterin oxidoreductase | insig. | 41 | 78 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03264 | | Periplasmic nitrate reductase | insig. | 41 | 78 |
| | Pseudomonas sp. BP01 | JOY50_RS27805 | | bifunctional nitrate reductase/sulfite reductase flavoprotein subunit alpha | insig. | 41 | 77 |
| | Pseudomonas putida KT2440 | PP_1703 | | assimilatory nitrate reductase/sulfite reductase | strong | 41 | 77 |
| | Methanococcus maripaludis JJ | MMJJ_RS07665 | | formate dehydrogenase subunit alpha | strong | 34 | 78 |
| | Methanococcus maripaludis S2 | MMP_RS06685 | | formate dehydrogenase H subunit alpha selenocysteine-containing | strong | 34 | 78 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_10100 | | nitrite reductase | cofit | 35 | 78 |
| | Dinoroseobacter shibae DFL-12 | Dshi_1282 | | formate dehydrogenase, alpha subunit (RefSeq) | insig. | 34 | 77 |
| | Cellulophaga baltica 18 | M666_RS14280 | | molybdopterin-dependent oxidoreductase | insig. | 33 | 77 |
| | Shewanella loihica PV-4 | Shew_0809 | | formate dehydrogenase, alpha subunit (RefSeq) | strong | 35 | 77 |
| | Rhodospirillum rubrum S1H | Rru_A0324 | | Formate dehydrogenase, alpha subunit (NCBI) | insig. | 34 | 77 |
| | Pseudomonas stutzeri RCH2 | Psest_3905 | | formate dehydrogenase, alpha subunit, archaeal-type | insig. | 35 | 77 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF1702 | | tungsten-containing formate dehydrogenase alpha subunit | insig. | 35 | 78 |
| | Methanococcus maripaludis JJ | MMJJ_RS04695 | | formate dehydrogenase subunit alpha | insig. | 32 | 77 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_1693 | | formate dehydrogenase, alpha subunit, archaeal-type | insig. | 33 | 77 |
| | Methanococcus maripaludis S2 | MMP_RS00795 | | formate dehydrogenase H subunit alpha selenocysteine-containing | sig. | 32 | 77 |
| | Shewanella amazonensis SB2B | Sama_1622 | | nitrate reductase catalytic subunit (RefSeq) | insig. | 31 | 76 |
| | Rahnella sp. WP5 | EX31_RS19950 | | formate dehydrogenase subunit alpha | insig. | 32 | 80 |
| | Azospirillum sp. SherDot2 | MPMX19_03518 | | Formate dehydrogenase H | insig. | 31 | 79 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF1821 | | Periplasmic nitrate reductase precursor (EC 1.7.99.4) | insig. | 32 | 77 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_23915 | | formate dehydrogenase subunit alpha | insig. | 33 | 77 |
| | Escherichia coli ECOR27 | NOLOHH_14830 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECOR38 | HEPCGN_22520 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECRC62 | BNILDI_13750 | napA | nitrate reductase catalytic subunit NapA | cofit | 31 | 77 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01505 | | Periplasmic nitrate reductase | insig. | 31 | 77 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS12885 | | periplasmic nitrate reductase subunit alpha | cofit | 31 | 77 |
| | Escherichia coli ECRC100 | OKFHMN_23255 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECRC101 | MCAODC_14305 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECRC102 | NIAGMN_21020 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECRC98 | JDDGAC_27215 | napA | nitrate reductase catalytic subunit NapA | insig. | 31 | 77 |
| | Escherichia coli ECRC99 | KEDOAH_04930 | napA | nitrate reductase catalytic subunit NapA | no data | 31 | 77 |
| | Azospirillum sp. SherDot2 | MPMX19_02939 | | Putative formate dehydrogenase | insig. | 33 | 77 |
| | Escherichia coli BW25113 | b2206 | napA | nitrate reductase, periplasmic, large subunit (NCBI) | insig. | 31 | 77 |
| | Escherichia fergusonii Becca | EFB2_01650 | | Periplasmic nitrate reductase | insig. | 31 | 77 |
| | Azospirillum brasilense Sp245 | AZOBR_RS32110 | | nitrate reductase catalytic subunit | insig. | 31 | 77 |