APC anti-human CD19 Antibody

Pricing & Availability
SJ25C1 (See other available formats)
Regulatory Status
Other Names
CD19 Molecule, CD19 Antigen, Differentiation Antigen CD19, B-Lymphocytes Surface Antigen B4, T-cell Surface Antigen Leu-12, CVID3, B4, B-lymphocyte Antigen CD19
Mouse IgG1, κ
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Product Citations
Human peripheral blood lymphocytes were stained with CD19 (clone SJ25C1) APC (filled histogram) or mouse IgG1, κ APC isotype control (open histogram).
  • SJ25C1_APC_CD19_Antibody_FC_080614.jpg
    Human peripheral blood lymphocytes were stained with CD19 (clone SJ25C1) APC (filled histogram) or mouse IgG1, κ APC isotype control (open histogram).
Compare all formats See APC spectral data
Cat # Size Price Save
363005 25 tests ¥21,780
363006 100 tests ¥44,880

CD19 is a 95 kD type I transmembrane glycoprotein also known as B4. It is a member of the immunoglobulin superfamily expressed on B cells (from pro-B to blastoid B cells, absent on plasma cells) and follicular dendritic cells. CD19 is involved in B cell development, activation, and differentiation. CD19 forms a complex with CD21 (CR2) and CD81 (TAPA-1), and functions as a BCR co-receptor.

Product Details
Technical data sheet

Product Details

Verified Reactivity
Antibody Type
Host Species
NALM1 + NALM16 cells
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and BSA (origin USA)
The antibody was purified by affinity chromatography and conjugated with APC under optimal conditions.
Lot-specific (to obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.)
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

FC - Quality tested

Recommended Usage

Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is 5 µl per million cells in 100 µl staining volume or 5 µl per 100 µl of whole blood.

Excitation Laser
Red Laser (633 nm)
Application Notes

Clone SJ25C1 partially blocks anti-human CD19 clones HIB19 and 4G7 staining based on in-house testing

Product Citations
  1. Liu C, et al. 2021. Cell. 184(7):1836-1857.e22. PubMed
  2. Liu J, et al. 2022. Front Neurol. 12:807646. PubMed
  3. Zong D, et al. 2021. BMC Biol. 19:79. PubMed
  4. Soldi R, et al. 2020. PLoS One. 15:e0235705. PubMed
  5. Rodda LB, et al. 2020. Cell. 184(1):169-183.e17. PubMed
  6. Yan K, et al. 2022. iScience. 25:104822. PubMed
  7. Mori A, et al. 2021. Cells. :10. PubMed
AB_2564127 (BioLegend Cat. No. 363005)
AB_2564128 (BioLegend Cat. No. 363006)

Antigen Details

Ig superfamily, type I transmembrane glycoprotein, 95 kD.

B lineage (except plasma cells), follicular dendritic cells.

B cell activation and differentiation.
Forms a complex with CD21, CD81 and CD225 in the membrane of mature B cells and interacts with VAV and LYN. It also interacts with GRAB2 and SOS when phosphorylated on Tyr-348 and/or Tyr-378 and with PLCG2 when phosphorylated on Tyr-409.
Forms complex with CD21 (CR2) and CD81 (TAPA-1), BCR co-receptor.
Cell Type
B cells, Dendritic cells
Biology Area
Costimulatory Molecules, Immunology
Molecular Family
CD Molecules
Antigen References

1. Tedder T, et al. 1994. Immunol. Today 15:437.
2. Bradbury L, et al. 1993. J. Immunol. 151:2915.

Gene ID
930 View all products for this Gene ID
View information about CD19 on UniProt.org

Related FAQs

There are no FAQs for this product.
Go To Top Version: 1    Revision Date: 08/28/2014

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, www.biolegend.com/ordering#license). BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.

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