CD19
Immune System · B-Cell Receptor Signaling & Antibody Repertoire
Is a CD19 gene result the same as measuring CD19-positive cells?
CD19 encodes a surface protein used by B lymphocytes. A cell-count or marker test measures cells expressing that protein, while a DNA test examines the gene's sequence.
- Common Gene Name
- CD19 molecule
- NCBI Gene ID
- 930
- Chromosome
- 16
Clinical Evidence Status
Established disease relationshipTumor 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 (2 records)
| Condition or drug | Evidence | Grade / status | Context | Source |
|---|---|---|---|---|
| immunodeficiency, common variable, 3 | ClinGen gene-disease validity | Definitive | Autosomal recessive | View source 2022-05-24 |
| Blinatumomab (2) | FDA labeling biomarker | Label mentions biomarker; actionability not inferred | Oncology | 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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