| Co | user | MtrA, tetrahydromethanopterin S-methyltransferase subunit A | NP_247845.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | transporter | WtpA | NP_248180.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | transporter | WtpB | NP_248371.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | transporter | WtpC | NP_248370.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | user | Aldehyde ferredoxin oxidoreductase | NP_248179.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | user | DMSO reductase family protein, FdhA | NP_246969.1 | | PDB BLAST (NCBI) | STRING search |
| Mo | user | Nitrogenase molybdenum-iron protein | NP_248427.1 | | PDB BLAST (NCBI) | STRING search |
| Mo_Se | user | DMSO reductase family protein, Sec-containing FdhA | NP_248356.1 | | PDB BLAST (NCBI) | STRING search |
| Mo_Se | user | DMSO reductase family protein, Sec-containing FdhA, formylmethanofuran dehydrogenase (tungsten), subunit B | NP_248189.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Acetyl-coenzyme A decarbonylase/synthase | NP_247120.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Acetyl-coenzyme A decarbonylase/synthase | NP_247124.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Methyl-coenzyme M reductase I, subunit alpha (mcrA) | NP_247840.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Methyl-coenzyme M reductase II, subunit alpha | NP_247047.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Ni carbon monoxide dehydrogenase, catalytic subunit | NP_247713.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Ni-Fe hydrogenase subunit | NP_247493.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Ni-Fe hydrogenase, coenzyme F420-reducing hydrogenase, alpha subunit, selenocysteine-containing | NP_246992.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Ni-Fe hydrogenase, formate hydrogenlyase, subunit 5 | NP_248021.1 | | PDB BLAST (NCBI) | STRING search |
| Ni | user | Ni-Fe hydrogenase, methylviologen-reducing hydrogenase, alpha subunit | NP_248187.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | CbiM | NP_248084.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | CbiN | NP_248083.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | CbiO | NP_248081.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | CbiQ | NP_248082.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | NikM | NP_248577.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | NikN2 | NP_248578.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | NikO | NP_248580.1 | | PDB BLAST (NCBI) | STRING search |
| Ni/Co | transporter | NikQ | NP_248579.1 | | PDB BLAST (NCBI) | STRING search |
| Se | user | Coenzyme F420-reducing hydrogenase, alpha subunit, FrhA | NP_246992.1 | | PDB BLAST (NCBI) | STRING search |
| Se | user | Coenzyme F420-reducing hydrogenase, alpha subunit, methylviologen-reducing hydrogenase, FrhA | NP_248187.1 | | PDB BLAST (NCBI) | STRING search |
| Se | user | Coenzyme F420-reducing hydrogenase, delta subunit, FrhD | NP_248185.1 | | PDB BLAST (NCBI) | STRING search |
| Se | user | HesB-like | | | PDB BLAST (NCBI) | STRING search |
| Se | user | Heterodisulfide reductase, subunit A, HdrA | NP_248184.1 | | PDB BLAST (NCBI) | STRING search |
| Se | user | Selenophosphate synthetase | NP_248600.1 | | PDB BLAST (NCBI) | STRING search |
