| Name | Metaprefix | URI |
|---|---|---|
| KEGG Orthology | kegg.orthology |
http://www.kegg.jp/entry/K00001 |
| Bioregistry | bioregistry |
https://bioregistry.io/kegg.orthology:K00001 |
| Identifiers.org | miriam |
https://identifiers.org/kegg.orthology:K00001 |
| Name-to-Thing | n2t |
https://n2t.net/kegg.orthology:K00001 |