Human CD19 Antibody

R&D Systems, part of Bio-Techne | Catalog # MAB11581

R&D Systems, part of Bio-Techne
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MAB11581-100
MAB11581-SP
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Key Product Details

Species Reactivity

Human

Applications

Flow Cytometry

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG1 Clone # 1083805

View all CD19 Antibodies »

Product Specifications

Immunogen

Whole Cells 
Accession # P15391

Specificity

Detects recombinant human CD19 protein in Direct ELISA.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Scientific Data Images for Human CD19 Antibody

Detection of CD19 in PBMC by Flow Cytometry

PBMC's were stained with Mouse Anti-Human CD3 epsilon APC-conjugated Monoclonal Antibody (Catalog # FAB100A) and either (A) Mouse Anti-Human CD19 Monoclonal Antibody (Catalog # MAB11581) or (B) isotype control antibody (Catalog # MAB002) followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B). View our protocol for Staining Membrane-associated Proteins.

Applications for Human CD19 Antibody

Application
Recommended Usage

Flow Cytometry

0.25 µg/106 cells
Sample: see below

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Reconstitution

Reconstitute lyophilized material at 0.2 mg/ml in sterile PBS. For liquid material, refer to CoA for concentration.

Reconstitution Buffer Available:
Size / Price
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Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: CD19

CD19, also known as B4, is a transmembrane glycoprotein of the immunoglobulin superfamily that plays a central role in B cell activation and humoral immune responses (1, 2). CD19 consists of an extracellular domain (ECD) with two C2-type Ig-like domains, a transmembrane segment, and a cytoplasmic domain with nine tyrosine residues, 3 of which are critical for function (1, 2). Within the mature ECD, human CD19 shares 57% amino acid sequence identity with mouse and rat CD19. CD19 is expressed throughout B cell development from pre‑B cells through mature B cells, and it is commonly used as a B cell lineage marker (1, 2). It is required for the responsiveness of mature B cell to antigen stimulation, germinal center development, and antibody affinity maturation (1, 2). CD19 associates with the B cell antigen receptor (BCR), CD81, CD38, CD21, CD22, and IFITM1/CD225/Leu-13 (1, 3). These associations enable CD19 to amplify B cell signaling and reduce the threshold for antigen stimulation through the BCR (1, 3). CD19 polymorphisms and up-regulation can lead to the development of autoimmunity by promoting autoantibody production (2). CD19 has emerged as promising therapeutic target for hematologic cancers and solid tumors, such as leukemias and lymphomas (4, 5). Immunotherapy using a chimeric antigen receptor (CAR) targeting CD19 has emerged as promising therapeutic target for hematologic cancers and solid tumors, such as leukemias and lymphomas (4, 5). The first CD19 CAR T cell therapies have been granted FDA approval for the treatment of B cell malignancies with several more in clinical trials (6).

References

  1. Wang, K. et al. (2012) Exp. Hematol. Oncol. 1:36.
  2. Del Nargo, C.J. et al. (2005) Immunol Res. 31:229.
  3. Yu, F. et al. (2010) J Neurooncol. 103:187.
  4. Kochenderfer, J. et al. (2015) J. Clin. Oncol. 33:540.
  5. Lee, D. et al. (2015) Lancet. 385:517.
  6. Ahmad, A. et al. (2020) Int. J. Mol. Sci. 21:3906.

Alternate Names

CD19, CVID3, Leu-12

Entrez Gene IDs

930 (Human); 12478 (Mouse); 365367 (Rat); 397669 (Porcine); 607898 (Canine); 102145514 (Cynomolgus Monkey); 100147468 (Equine)

Gene Symbol

CD19

UniProt

P15391 (Human)

Additional CD19 Products

Product Documents for Human CD19 Antibody

Product Datasheets

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human CD19 Antibody

For research use only

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