751-780 of 852
| Silicibacter sp. TM1040 | Bacteria | Ni | user | urease subunit alpha | YP_612380.1 | | PDB BLAST (NCBI) | STRING search |
| Sinorhizobium medicae WSM419 | Bacteria | Ni | user | urease subunit alpha | YP_001328050.1 | | PDB BLAST (NCBI) | STRING search |
| Sinorhizobium meliloti 1021 | Bacteria | Ni | user | urease subunit alpha | NP_386576.1 | | PDB BLAST (NCBI) | STRING search |
| Sodalis glossinidius str. 'morsitans' | Bacteria | Ni | user | urease alpha | | | PDB BLAST (NCBI) | STRING search |
| Solibacter usitatus Ellin6076 | Bacteria | Ni | user | Ni-Fe hydrogenase | YP_827763.1 | | PDB BLAST (NCBI) | STRING search |
| Solibacter usitatus Ellin6076 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit | YP_826256.1 | | PDB BLAST (NCBI) | STRING search |
| Solibacter usitatus Ellin6076 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit | YP_828124.1 | | PDB BLAST (NCBI) | STRING search |
| Sphingopyxis alaskensis RB2256 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit | YP_611130.1 | | PDB BLAST (NCBI) | STRING search |
| Staphylococcus aureus subsp. aureus MRSA252 | Bacteria | Ni | user | urease subunit alpha | YP_041729.1 | | PDB BLAST (NCBI) | STRING search |
| Staphylococcus epidermidis RP62A | Bacteria | Ni | user | urease subunit alpha | YP_189432.1 | | PDB BLAST (NCBI) | STRING search |
| Staphylococcus saprophyticus subsp. saprophyticus ATCC 15305 | Bacteria | Ni | user | urease subunit alpha | YP_300353.1 | | PDB BLAST (NCBI) | STRING search |
| Staphylothermus marinus F1 | Archaea | Ni | user | Ni-Fe hydrogenase III HycE large subunit | YP_001040042.1 | | PDB BLAST (NCBI) | STRING search |
| Staphylothermus marinus F1 | Archaea | Ni | user | Ni-Fe hydrogenase III HycE large subunit | YP_001041067.1 | | PDB BLAST (NCBI) | STRING search |
| Stigmatella aurantiaca DW4/3-1 | Bacteria | Ni | user | urease, alpha subunit | ZP_01461797.1 | | PDB BLAST (NCBI) | STRING search |
| Streptococcus thermophilus CNRZ1066 | Bacteria | Ni | user | urease subunit alpha | YP_140710.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces avermitilis MA-4680 | Bacteria | Ni | user | Ni SodN | NP_824164.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces avermitilis MA-4680 | Bacteria | Ni | user | Ni-Fe hydrogenase large subunit | NP_828543.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces avermitilis MA-4680 | Bacteria | Ni | user | urease subunit alpha | NP_823891.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces avermitilis MA-4680 | Bacteria | Ni | user | urease subunit alpha | NP_828282.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces coelicolor A3(2) | Bacteria | Ni | user | Ni SodN | NP_629400.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces coelicolor A3(2) | Bacteria | Ni | user | urease subunit alpha | NP_625522.1 | | PDB BLAST (NCBI) | STRING search |
| Streptomyces coelicolor A3(2) | Bacteria | Ni | user | urease subunit alpha | NP_629660.1 | | PDB BLAST (NCBI) | STRING search |
| Strongylocentrotus purpuratus | Eukaryota | Ni | user | Urease | XP_001180473.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfitobacter sp. NAS-14.1 | Bacteria | Ni | user | urease, alpha subunit | ZP_00962028.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfolobus solfataricus P2 | Archaea | Ni | user | Ni-Fe hydrogenase, formate hydrogenlyase subunit 5 (hycE) | NP_342496.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfolobus tokodaii str. 7 | Archaea | Ni | user | urease subunit alpha | NP_376944.2 | | PDB BLAST (NCBI) | STRING search |
| Sulfurimonas denitrificans DSM 1251 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit | YP_393947.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfurimonas denitrificans DSM 1251 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit | YP_393949.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfurovum sp. NBC37-1 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit HupV | YP_001358971.1 | | PDB BLAST (NCBI) | STRING search |
| Sulfurovum sp. NBC37-1 | Bacteria | Ni | user | Ni-Fe hydrogenase, large subunit HycE | YP_001357580.1 | | PDB BLAST (NCBI) | STRING search |
