| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU3167 | | heme biosynthesis protein, putative (TIGR) | no data | 100 | 100 |
| o | Desulfovibrio vulgaris Miyazaki F | DvMF_2503 | | putative transcriptional regulator, AsnC family (RefSeq) | no data | 77 | 100 |
| o | Magnetospirillum magneticum AMB-1 | AMB_RS07105 | | Lrp/AsnC family transcriptional regulator | cofit | 34 | 96 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS07115 | | Lrp/AsnC family transcriptional regulator | insig. | 36 | 93 |
| o | Dinoroseobacter shibae DFL-12 | Dshi_3174 | | putative transcriptional regulator, AsnC family (RefSeq) | insig. | 37 | 93 |
| | Dinoroseobacter shibae DFL-12 | Dshi_3176 | | putative transcriptional regulator, AsnC family (RefSeq) | strong | 36 | 91 |
| o | Pseudomonas stutzeri RCH2 | Psest_0823 | | Transcriptional regulators | strong | 32 | 90 |
| | Pseudomonas sp. SVBP6 | COO64_RS14085 | | Lrp/AsnC family transcriptional regulator | insig. | 35 | 69 |
| | Pseudomonas stutzeri RCH2 | Psest_0825 | | transcriptional regulator, AsnC family | no data | 35 | 93 |
| o | Dechlorosoma suillum PS | Dsui_1932 | | transcriptional regulator | cofit | 31 | 93 |
| | Pseudomonas sp. RS175 | PFR28_02235 | | hypothetical protein | insig. | 37 | 69 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_25040 | | nitrite reductase | no data | 38 | 73 |
| o | Pseudomonas aeruginosa MRSN321 | PFGADD_00521 | nirH | Siroheme decarboxylase NirH subunit | insig. | 35 | 93 |
| o | Pseudomonas aeruginosa PA14 | IKLFDK_22875 | | Siroheme decarboxylase NirH subunit | insig. | 35 | 93 |
| o | Pseudomonas aeruginosa PUPa3 | NPBIFN_00524 | nirH | Siroheme decarboxylase NirH subunit | insig. | 35 | 93 |
| | Pseudomonas sp. RS175 | PFR28_02237 | | hypothetical protein | insig. | 36 | 91 |
| | Pseudomonas sp. SVBP6 | COO64_RS14075 | | Lrp/AsnC family transcriptional regulator | insig. | 35 | 90 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_700 | | Heme d1 biosynthesis protein NirL | sig. | 35 | 69 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03457 | | hypothetical protein | cofit | 39 | 68 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_698 | | Heme d1 biosynthesis protein NirH | sig. | 36 | 73 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_21945 | | protein nirL | insig. | 35 | 69 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_25050 | | protein nirL | insig. | 34 | 69 |
| | Pseudomonas aeruginosa MRSN321 | PFGADD_00523 | nirL | Siroheme decarboxylase NirL subunit | insig. | 35 | 89 |
| | Pseudomonas aeruginosa PUPa3 | NPBIFN_00526 | nirL | Siroheme decarboxylase NirL subunit | insig. | 35 | 89 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_22865 | | Siroheme decarboxylase NirL subunit | insig. | 35 | 89 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03455 | | hypothetical protein | cofit | 34 | 67 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_5769 | | Heme d1 biosynthesis protein NirL | insig. | 35 | 69 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_5771 | | Heme d1 biosynthesis protein NirH | no data | 35 | 71 |
| | Dechlorosoma suillum PS | Dsui_1930 | | transcriptional regulator | strong | 31 | 96 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_21935 | | nitrite reductase | insig. | 34 | 68 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_21950 | | AsnC family transcriptional regulator | insig. | 26 | 82 |
| | Dinoroseobacter shibae DFL-12 | Dshi_3176 | | putative transcriptional regulator, AsnC family (RefSeq) | strong | 35 | 57 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2900 | | putative transcriptional regulator, AsnC family (RefSeq) | no data | 30 | 63 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03454 | | hypothetical protein | cofit | 25 | 84 |
| | Pseudomonas stutzeri RCH2 | Psest_0822 | | Transcriptional regulators | strong | 31 | 59 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_5768 | | Heme d1 biosynthesis protein NirD | strong | 25 | 82 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0854 | | NirD protein, putative (TIGR) | no data | 30 | 63 |
| | Pseudomonas aeruginosa PUPa3 | NPBIFN_00527 | nirD | Siroheme decarboxylase NirD subunit | sig. | 29 | 60 |
| | Dechlorosoma suillum PS | Dsui_1931 | | transcriptional regulator | strong | 31 | 60 |
| | Pseudomonas aeruginosa MRSN321 | PFGADD_00524 | nirD | Siroheme decarboxylase NirD subunit | sig. | 29 | 60 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_22860 | | Siroheme decarboxylase NirD subunit | insig. | 29 | 60 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_4553 | | Transcriptional regulator, AsnC family | insig. | 28 | 75 |
| | Pseudomonas sp. RS175 | PFR28_02234 | | hypothetical protein | insig. | 27 | 82 |
| | Pseudomonas sp. SVBP6 | COO64_RS14090 | | Lrp/AsnC family transcriptional regulator | insig. | 24 | 82 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_701 | | Heme d1 biosynthesis protein NirD / Heme d1 biosynthesis protein NirL | sig. | 23 | 83 |
| | Pseudomonas sp. SVBP6 | COO64_RS14080 | | Lrp/AsnC family transcriptional regulator | insig. | 25 | 83 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_25055 | | AsnC family transcriptional regulator | insig. | 23 | 84 |
| | Dinoroseobacter shibae DFL-12 | Dshi_3175 | | putative transcriptional regulator, AsnC family (RefSeq) | sig. | 26 | 59 |
| | Dechlorosoma suillum PS | Dsui_1930 | | transcriptional regulator | strong | 27 | 57 |
| | Methanococcus maripaludis S2 | MMP_RS05870 | | Lrp/AsnC family transcriptional regulator | no data | 25 | 43 |
| | Methanococcus maripaludis JJ | MMJJ_RS08485 | | Lrp/AsnC family transcriptional regulator | sig. | 25 | 43 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS14120 | | Lrp/AsnC family transcriptional regulator | insig. | 28 | 58 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS07100 | | Lrp/AsnC family transcriptional regulator | insig. | 27 | 59 |