# CA19-9

> tumor marker

**Wikidata**: [Q182517](https://www.wikidata.org/wiki/Q182517)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/CA19-9)  
**Source**: https://4ort.xyz/entity/ca19-9


## References

1. sialyl Lewis a antigen. PubChem
2. ChEBI release 2020-09-01
3. Freebase Data Dumps. 2013
4. (6R)-5-Acetamido-3,5-dideoxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]-beta-L-threo-hex-2-ulopyranonosyl-(2->3)-beta-D-galactopyranosyl-(1->3)-[6-deoxy-alpha-L-galactopyranosyl-(1->4)]-2-acetamido-2-deoxy-D-. ChemSpider
5. alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->3)-[alpha-L-Fuc-(1->4)]-D-GlcNAc. ChEBI
6. UMLS 2023
7. Immune Epitope Database and Analysis Resource
8. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
9. UniChem