| Provider Name | Provider Code | URI |
|---|---|---|
| Homeodomain Research | hdr |
http://research.nhgri.nih.gov/apps/homeodomain/web/index.cgi?mode=view&view=proteins&id=63 |
| Bioregistry | bioregistry |
https://bioregistry.io/hdr:63 |
| Identifiers.org | miriam |
https://identifiers.org/hdr:63 |
| Name-to-Thing | n2t |
https://n2t.net/hdr:63 |