| Provider Name | Provider Code | URI |
|---|---|---|
| Enzyme Nomenclature | ec |
https://www.enzyme-database.org/query.php?ec=2 |
| Enzyme Nomenclature (RDF) | rdf |
https://purl.expasy.org/enzyme/EC/2 |
| Bioregistry | bioregistry |
https://bioregistry.io/ec:2 |
| Identifiers.org | miriam |
https://identifiers.org/ec-code:2 |
| Name-to-Thing | n2t |
https://n2t.net/ec-code:2 |