| node1 | node2 | node1 accession | node2 accession | node1 annotation | node2 annotation | score |
| Rmet_3331 | nirC | Rmet_3331 | Rmet_2079 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Cytochrome c55X (precursor). | 0.926 |
| Rmet_3331 | nirF | Rmet_3331 | Rmet_2080 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Cytochrome d1, heme region. | 0.729 |
| Rmet_3331 | nirG | Rmet_3331 | Rmet_2081 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Transcriptional Regulator, AsnC family. | 0.899 |
| Rmet_3331 | nirH | Rmet_3331 | Rmet_6507 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Nitrite reductase heme biosynthesis H protein. | 0.897 |
| Rmet_3331 | nirJ | Rmet_3331 | Rmet_2082 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Heme d1 biosynthesis protein NirJ. | 0.859 |
| Rmet_3331 | nirJ-2 | Rmet_3331 | Rmet_3170 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Heme d1 biosynthesis protein NirJ. | 0.861 |
| Rmet_3331 | nirN | Rmet_3331 | Rmet_3169 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Nitrite reductase (NO-forming). | 0.897 |
| Rmet_3331 | nirS | Rmet_3331 | Rmet_3172 | Cytochrome c, class I:Cytochrome d1, heme region precursor. | Nitrite reductase precursor (Cytochrome cd1) (Cytochrome oxidase) (Hydroxylamine reductase). | 0.543 |
| hemH | nirJ | Rmet_1001 | Rmet_2082 | Ferrochelatase; Catalyzes the ferrous insertion into protoporphyrin IX. Belongs to the ferrochelatase family. | Heme d1 biosynthesis protein NirJ. | 0.913 |
| hemH | nirJ-2 | Rmet_1001 | Rmet_3170 | Ferrochelatase; Catalyzes the ferrous insertion into protoporphyrin IX. Belongs to the ferrochelatase family. | Heme d1 biosynthesis protein NirJ. | 0.913 |
| nirC | Rmet_3331 | Rmet_2079 | Rmet_3331 | Cytochrome c55X (precursor). | Cytochrome c, class I:Cytochrome d1, heme region precursor. | 0.926 |
| nirC | nirF | Rmet_2079 | Rmet_2080 | Cytochrome c55X (precursor). | Cytochrome d1, heme region. | 0.989 |
| nirC | nirG | Rmet_2079 | Rmet_2081 | Cytochrome c55X (precursor). | Transcriptional Regulator, AsnC family. | 0.989 |
| nirC | nirH | Rmet_2079 | Rmet_6507 | Cytochrome c55X (precursor). | Nitrite reductase heme biosynthesis H protein. | 0.989 |
| nirC | nirJ | Rmet_2079 | Rmet_2082 | Cytochrome c55X (precursor). | Heme d1 biosynthesis protein NirJ. | 0.968 |
| nirC | nirJ-2 | Rmet_2079 | Rmet_3170 | Cytochrome c55X (precursor). | Heme d1 biosynthesis protein NirJ. | 0.863 |
| nirC | nirN | Rmet_2079 | Rmet_3169 | Cytochrome c55X (precursor). | Nitrite reductase (NO-forming). | 0.927 |
| nirC | nirS | Rmet_2079 | Rmet_3172 | Cytochrome c55X (precursor). | Nitrite reductase precursor (Cytochrome cd1) (Cytochrome oxidase) (Hydroxylamine reductase). | 0.902 |
| nirE | nirG | Rmet_3168 | Rmet_2081 | Uroporphyrin-III C-methyltransferase (Urogen III methylase) (SUMT) (Uroporphyrinogen III methylase) (UROM). | Transcriptional Regulator, AsnC family. | 0.454 |
| nirE | nirH | Rmet_3168 | Rmet_6507 | Uroporphyrin-III C-methyltransferase (Urogen III methylase) (SUMT) (Uroporphyrinogen III methylase) (UROM). | Nitrite reductase heme biosynthesis H protein. | 0.455 |