| Name | Metaprefix | URI |
|---|---|---|
| Protein Ontology | pr |
https://proconsortium.org/app/entry/PR:000000024 |
| Bioregistry | bioregistry |
https://bioregistry.io/pr:000000024 |
| Identifiers.org | miriam |
https://identifiers.org/PR:000000024 |
| Name-to-Thing | n2t |
https://n2t.net/pr:000000024 |