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Rabbit Recombinant Monoclonal CD19 antibody. Carrier free. Suitable for IHC-P, WB, ICC/IF, Flow Cyt (Intra) and reacts with Human samples.


Images

Flow Cytometry (Intracellular) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (AB271904), expandable thumbnail
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (AB271904), expandable thumbnail
  • Immunocytochemistry/ Immunofluorescence - Anti-CD19 antibody [EPR5906] - BSA and Azide free (AB271904), expandable thumbnail
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (AB271904), expandable thumbnail
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (AB271904), expandable thumbnail

Key facts

Isotype

IgG

Host species

Rabbit

Storage buffer

pH: 7.2 - 7.4
Constituents: PBS

Form

Liquid

Clonality

Monoclonal

Immunogen

  • The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

Select an application
Product promiseTestedExpectedPredictedNot recommended
IHC-PIPWBICC/IFFlow Cyt (Intra)
Human
Tested
Not recommended
Expected
Tested
Tested

Tested
Tested

Species

Human

Dilution info
-
Notes

Perform heat-mediated antigen retrieval before commencing with IHC staining protocol.

Not recommended
Not recommended

Species

Human

Dilution info

-

Notes

-

Expected
Expected

Species

Human

Dilution info

Use at an assay dependent concentration.

Notes

-

Tested
Tested

Species

Human

Dilution info

-

Notes

-

Tested
Tested

Species

Human

Dilution info

-

Notes

-

Associated Products

Select an associated product type

5 products for Alternative Product

1 product for Alternative Version

Target data

Function

Functions as a coreceptor for the B-cell antigen receptor complex (BCR) on B-lymphocytes (PubMed:29523808). Decreases the threshold for activation of downstream signaling pathways and for triggering B-cell responses to antigens (PubMed:1373518, PubMed:16672701, PubMed:2463100). Activates signaling pathways that lead to the activation of phosphatidylinositol 3-kinase and the mobilization of intracellular Ca(2+) stores (PubMed:12387743, PubMed:16672701, PubMed:9317126, PubMed:9382888). Is not required for early steps during B cell differentiation in the blood marrow (PubMed:9317126). Required for normal differentiation of B-1 cells (By similarity). Required for normal B cell differentiation and proliferation in response to antigen challenges (PubMed:1373518, PubMed:2463100). Required for normal levels of serum immunoglobulins, and for production of high-affinity antibodies in response to antigen challenge (PubMed:12387743, PubMed:16672701, PubMed:9317126).

Alternative names

CD19, B-lymphocyte antigen CD19, B-lymphocyte surface antigen B4, Differentiation antigen CD19, T-cell surface antigen Leu-12, CD19

Recommended products

Rabbit Recombinant Monoclonal CD19 antibody. Carrier free. Suitable for IHC-P, WB, ICC/IF, Flow Cyt (Intra) and reacts with Human samples.

Key facts

Isotype

IgG

Form

Liquid

Clonality

Monoclonal

Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Carrier free

Yes

Clone number

EPR5906

Purification technique

Affinity purification Protein A

Concentration
Loading...

Storage

Shipped at conditions

Blue Ice

Appropriate short-term storage conditions

+4°C

Appropriate long-term storage conditions

+4°C

Storage information

Do Not Freeze

Notes

ab271904 is the carrier-free version of Anti-CD19 antibody [EPR5906] ab134114.

Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Our carrier-free antibodies are typically supplied in a PBS-only formulation, purified and free of BSA, sodium azide and glycerol. The carrier-free buffer and high concentration allow for increased conjugation efficiency.

This conjugation-ready format is designed for use with fluorochromes, metal isotopes, oligonucleotides, and enzymes, which makes them ideal for antibody labelling, functional and cell-based assays, flow-based assays (e.g. mass cytometry) and Multiplex Imaging applications.

Use our conjugation kits for antibody conjugates that are ready-to-use in as little as 20 minutes with 1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

This product is compatible with the Maxpar® Antibody Labeling Kit from Fluidigm, without the need for antibody preparation. Maxpar® is a trademark of Fluidigm Canada Inc.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.

Activity summary

CD19 is a transmembrane protein also known as B4 or B-lymphocyte antigen CD19 with an approximate molecular weight of 95 kDa. It is expressed on the surface of B cells throughout their development from pro-B cells to mature B cells. CD19 functions mechanically as a coreceptor enhancing the sensitivity of B cell receptor (BCR) signaling. This protein plays a significant role in promoting the activation and proliferation of B cells by lowering the threshold for antigen receptor engagement.

Biological function summary

CD19 acts as an essential player in B cell signaling. CD19 integrates signals from the BCR with other coreceptors acting as a signaling hub. It participates in forming a signaling complex that includes proteins like CD21 and CD81 which further amplifies BCR-mediated signaling. This complex plays a critical role in B cell activation differentiation and survival ensuring that immune responses are efficiently mounted against pathogens.

Pathways

The CD19 protein fits into key immune response pathways such as the BCR signaling pathway and the PI3K-Akt signaling pathway. CD19 collaborates with other proteins like CD21 CD81 and PI3K within these pathways. Its interaction in the PI3K-Akt pathway for instance supports critical processes including B cell activation and homeostasis contributing to the adaptive immune response.

Associated diseases and disorders

CD19 is connected to B cell malignancies and autoimmune diseases. B cell acute lymphoblastic leukemia (ALL) often shows aberrant CD19 expression making it a valuable target for therapeutic interventions like anti-CD19 monoclonal antibodies. Additionally overexpression or mutations of CD19 may contribute to autoimmune diseases by disrupting normal B cell regulation. CD19's connection with proteins like CD22 and CD20 in these pathological contexts highlights its relevance in developing targeted therapies.

Product promise

We are dedicated to supporting your work with high quality reagents and we are here for you every step of the way should you need us.

In the unlikely event of one of our products not working as expected, you are covered by our product promise.

Full details and terms and conditions can be found here:
Terms & Conditions.

9 product images

  • Flow Cytometry (Intracellular) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Flow Cytometry (Intracellular) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Intracellular Flow Cytometry analysis of Raji cells (Human Burkitt's lymphoma B lymphocyte) labelling CD19 with Anti-CD19 antibody [EPR5906] ab134114 at 1/1000 dilution, 1.186 μg/ml (red). Cells were fixed with 4% paraformaldehyde, permeabilised with 90% methanol. Goat anti rabbit IgG (Alexa Fluor® 488, Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) ab150077) was used as the secondary antibody at 1/2000.

    Isotype control (black) - Rabbit monoclonal IgG (Rabbit IgG, monoclonal [EPR25A] - Isotype Control ab172730)

    Unlabeled control (blue) - Unlabelled cells

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human tonsil tissue labelling CD19 with unpurified Anti-CD19 antibody [EPR5906] ab134114 at a dilution of 1/250.

    Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunocytochemistry/ Immunofluorescence - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunocytochemistry/ Immunofluorescence - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunocytochemistry/Immunofluorescence analysis of Raji cells labelling CD19 with purified Anti-CD19 antibody [EPR5906] ab134114 at a dilution of 1/500. Cells were fixed with 4% paraformaldehyde and permeabilized with 0.1% Triton X-100. Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) ab150077, an Alexa Fluor® 488-conjugated goat anti-rabbit IgG (1/1000) was used as the secondary antibody. DAPI (blue) was used as the nuclear counterstain. Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291, a mouse anti-tubulin (1/1000) and Goat Anti-Mouse IgG H&L (Alexa Fluor® 594) preadsorbed ab150120, an Alexa Fluor® 594-conjugated goat anti-mouse IgG (1/1000) were also used.

    Control 1: primary antibody (1/500) and secondary antibody, Goat Anti-Mouse IgG H&L (Alexa Fluor® 594) preadsorbed ab150120, an Alexa Fluor® 594-conjugated goat anti-mouse IgG (1/1000).

    Control 2: Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291 (1/1000) and secondary antibody, Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) ab150077, an Alexa Fluor® 488-conjugated goat anti-rabbit IgG (1/1000).

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human tonsil tissue labelling CD19 with purified Anti-CD19 antibody [EPR5906] ab134114 at a dilution of 1/500. Heat mediated antigen retrieval was performed using EDTA buffer pH 9. Goat Anti-Rabbit IgG H&L (HRP) ab97051, a HRP-conjugated goat anti-rabbit IgG (H+L) was used as the secondary antibody (1/500). Negative control using PBS instead of primary antibody. Counterstained with hematoxylin.This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Negative tissue: Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human liver tissue labelling CD19 with purified Anti-CD19 antibody [EPR5906] ab134114 at a dilution of 1/500. Heat mediated antigen retrieval was performed using EDTA buffer pH 9. Goat Anti-Rabbit IgG H&L (HRP) ab97051, a HRP-conjugated goat anti-rabbit IgG (H+L) was used as the secondary antibody (1/500). Negative control using PBS instead of primary antibody. Counterstained with hematoxylin.This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human diffuse large B-cell lymphoma tissue labelling CD19 with unpurified Anti-CD19 antibody [EPR5906] ab134114.

    Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human spleen tissue labelling CD19 with unpurified Anti-CD19 antibody [EPR5906] ab134114.

    Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human B-cell chronic lymphocytic leukaemia tissue labelling CD19 with unpurified Anti-CD19 antibody [EPR5906] ab134114.

    Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD19 antibody [EPR5906] - BSA and Azide free (ab271904)

    Immunohistochemical analysis of paraffin embedded human skeletal muscle tissue using unpurified Anti-CD19 antibody [EPR5906] ab134114 showing negative staining.

    Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

    This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (Anti-CD19 antibody [EPR5906] ab134114).

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can:

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