JAK2
Universal Cellular Machinery · Phosphorylation & Kinase Signaling Cascades
Why is JAK2 often investigated when blood-cell counts are abnormal?
JAK2 makes a kinase that relays signals controlling blood-cell production. Particular acquired alterations can be relevant to blood disorders, but a gene entry alone cannot explain an abnormal count.
- Common Gene Name
- Janus kinase 2
- NCBI Gene ID
- 3717
- Chromosome
- 9
Clinical Evidence Status
Tumor or drug-label biomarker context
These labels describe available evidence about a gene. They do not classify your variant or recommend a treatment.
Answer Sources
Explore supporting evidence (5 records)
| Condition or drug | Evidence | Grade / status | Context | Source |
|---|---|---|---|---|
| Crohn disease | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-09 | |
| Polycythemia vera | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-09 | |
| Primary myelofibrosis | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-09 | |
| Essential thrombocythemia | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-09 | |
| Ropeginterferon Alfa-2b-njft | FDA labeling biomarker | Label mentions biomarker; actionability not inferred | Hematology | View source |
Source snapshot: 2026-09-09. Consumer text updated: 2026-09-10. Source dates describe the cited records, not a new clinical review.
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