Key Product Details

Species Reactivity

Validated:

Human

Cited:

Human

Applications

Validated:

Immunohistochemistry, Immunohistochemistry-Paraffin, ELISA, Flow Cytometry, Immunocytochemistry/ Immunofluorescence, CyTOF-ready

Cited:

ELISA, Flow Cytometry, Immunoprecipitation

Label

Unconjugated

Antibody Source

Recombinant Monoclonal Mouse IgG2a Kappa Clone # FMC63

Format

Azide and BSA Free
View all CD19 Primary Antibodies »

Product Specifications

Immunogen

Human prolymphocytic leukaemia cell line JVM3.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG2a Kappa

Scientific Data Images for CD19 Antibody (FMC63) - Azide and BSA Free

Immunohistochemical Staining of CD19 in Paraffin Embedded Human Spleen

Immunohistochemical Staining of CD19 in Paraffin Embedded Human Spleen

Immunohistochemical staining of human spleen tissue using anti-CD19 antibody. Image from verified customer review.
Immunohistochemical Detection of CD19 in Paraffin Embedded Rat Spleen

Immunohistochemical Detection of CD19 in Paraffin Embedded Rat Spleen

Immunohistochemical staining of rat spleen tissue using anti-CD19 antibody. FMC63. Anti-CD19 staining of formaldehyde fixed paraffin embedded rat spleen tissue, at 40x magnification. The mouse IgG 2A-chimeric version of FMC63 (NBP2-52716) was used to stain samples at a concentration of 3 ug/ml.

Applications for CD19 Antibody (FMC63) - Azide and BSA Free

Application
Recommended Usage

Flow Cytometry

1:10 - 1:1000

Immunocytochemistry/ Immunofluorescence

1:10 - 1:500
Application Notes
Use in ELISA reported in scientific literature (PMID:33735268). This antibody is Cytof ready.

Reviewed Applications

Read 1 review rated 5 using NBP2-52716 in the following applications:

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Flow Cytometry

Formulation, Preparation, and Storage

Purification

Protein A purified

Formulation

PBS

Format

Azide and BSA Free

Preservative

0.02% Proclin 300

Concentration

1 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C for up to 3 months. For longer storage, aliquot and store at -20C.

Background: CD19

CD19 (Cluster of Differentiation 19), also known as B-lymphocyte surface antigen B4, is a type 1 transmembrane glycoprotein belonging to immunoglobulin (Ig) subfamily that serves as a biomarker for normal and neoplastic B cells (1,2). CD19 is a co-receptor for the B cell receptor (BCR) signaling complex and has a critical role in regulating B cell signaling and immune response (1,2). The CD19 protein contains an extracellular N-terminus containing two C2 Ig-like domains separated by a helical non-Ig domain, a single pass transmembrane domain, and a highly conserved cytoplasmic C-terminal domain (1,2). The human CD19 protein, encoded by the CD19 gene located on chromosome 16p11.2, is 556 amino acids (aa) in length with a calculated theoretical molecular weight (MW) of 61 kDa and an observed molecular weight of 95 kDa (1-3). CD19 associates with other molecules - CD21, CD81, and CD225 - to form the BCR co-complex, also called the CD19 complex, through CD21 binding to the complement C3d complex (1-3). Complement C3d bridges the BCR with the CD19 complex into lipid rafts of the plasma membrane (1-3). CD19 is capable of modulating B cell development through both BCR-dependent and -independent signaling (1-3). Upon BCR activation, the tyrosine residues of CD19's cytoplasmic tail recruits multiple kinases including Lyn, Vav, and PI3K, amplifying BCR-mediated immune signaling and B cell activation (1-3).

Considering the role of CD19 in BCR signaling and its expression in development from pre-B cells through plasma cells, it is understandable that CD19 dysfunction and abnormal expression is associated with numerous B cell malignancies and autoimmune disorders (1-5). CD19 expression is typically observed at relatively normal levels in B cell acute lymphoblastic leukemia (B-ALL) and chronic lymphoblastic leukemia (CLL) but is often reduced other types of lymphoma including diffuse large B cell lymphoma (DLBCL) and follicular lymphoma (FL) (1,2). On the other hand, CD19 expression is typically increased in autoimmune disorders such as systemic sclerosis (SSc) and multiple sclerosis (MS) as modeled by experimental autoimmune encephalomyelitis (EAE) (2). CD19 has become a therapeutic molecular target for the treatment of B cell lymphomas and autoimmune disorders using monoclonal antibodies (mAbs), bi-specific T cell engaging (BiTE) antibodies, and CD19-specific chimeric antigen receptor (CAR) T cells (1,2,4-6). Although anti-CD19 CAR T cell therapy has become the standard for the treatment of B cell malignancies, patients may experience relapse due to resistance mechanisms (6). Strategies to improve efficacy and limit relapse include combination of CAR T cell therapy with immune checkpoint inhibitors like anti-PD-1 (4,6).

References

1. Wang K, Wei G, Liu D. CD19: a biomarker for B cell development, lymphoma diagnosis and therapy. Exp Hematol Oncol. 2012;1(1):36. https://doi.org/10.1186/2162-3619-1-36

2. Li X, Ding Y, Zi M, et al. CD19, from bench to bedside. Immunol Lett. 2017;183:86-95. https://doi.org/10.1016/j.imlet.2017.01.010

3. Wentink MWJ, van Zelm MC, van Dongen JJM, Warnatz K, van der Burg M. Deficiencies in the CD19 complex. Clin Immunol. 2018;195:82-87. https://doi.org/10.1016/j.clim.2018.07.017

4. Frigault MJ, Maus MV. State of the art in CAR T cell therapy for CD19+ B cell malignancies. J Clin Invest. 2020;130(4):1586-1594. https://doi.org/10.1172/JCI129208

5. Penack O, Koenecke C. Complications after CD19+ CAR T-Cell Therapy. Cancers (Basel). 2020;12(11):3445. https://doi.org/10.3390/cancers12113445

6. Bouziana S, Bouzianas D. Anti-CD19 CAR-T cells: Digging in the dark side of the golden therapy. Crit Rev Oncol Hematol. 2021;157:103096. https://doi.org/10.1016/j.critrevonc.2020.103096

Alternate Names

CD19, CVID3, Leu-12

Gene Symbol

CD19

Additional CD19 Products

Product Documents for CD19 Antibody (FMC63) - Azide and BSA Free

Certificate of Analysis

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

Product Specific Notices for CD19 Antibody (FMC63) - Azide and BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Citations for CD19 Antibody (FMC63) - Azide and BSA Free

Customer Reviews for CD19 Antibody (FMC63) - Azide and BSA Free (1)

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Customer Images

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  • CD19 Antibody (FMC63)
    Name: Anonymous
    Application: Immunohistochemistry-Paraffin
    Sample Tested: Spleen tissue
    Species: Human
    Verified Customer | Posted 12/29/2021
    Human spleen tissue
    CD19 Antibody (FMC63) - Azide and BSA Free NBP2-52716

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Protocols

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FAQs for CD19 Antibody (FMC63) - Azide and BSA Free

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  • Q: FMC63 CD19 antibody is this antibody low endotoxin? Could it be used for in vitro culture in functional assays? also, is the 0.02% proclin 300 preservative amenable to in vitro cell culture?

    A: It has not been tested in in vitro, but it should be low endotoxin as it is protein a purified. However Proclin is probably not good for cell culture.

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