• Product nameAnti-CD79a antibody
    See all CD79a primary antibodies
  • Description
    Rabbit polyclonal to CD79a
  • Tested applicationsSuitable for: IHC-P, ELISA, WBmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide (Human).

  • Positive control
    • Human tonsil sections. Spleen.



Our Abpromise guarantee covers the use of ab5691 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IHC-P 1/100. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
ELISA Use a concentration of 0.1 - 1 µg/ml.
WB Use a concentration of 0.5 - 2 µg/ml. Predicted molecular weight: 25 kDa.


  • FunctionRequired in cooperation with CD79B for initiation of the signal transduction cascade activated by binding of antigen to the B-cell antigen receptor complex (BCR) which leads to internalization of the complex, trafficking to late endosomes and antigen presentation. Also required for BCR surface expression and for efficient differentiation of pro- and pre-B-cells. Stimulates SYK autophosphorylation and activation. Binds to BLNK, bringing BLNK into proximity with SYK and allowing SYK to phosphorylate BLNK. Also interacts with and increases activity of some Src-family tyrosine kinases. Represses BCR signaling during development of immature B cells.
  • Tissue specificityB-cells.
  • Involvement in diseaseDefects in CD79A are the cause of agammaglobulinemia type 3 (AGM3) [MIM:613501]. It is a primary immunodeficiency characterized by profoundly low or absent serum antibodies and low or absent circulating B cells due to an early block of B-cell development. Affected individuals develop severe infections in the first years of life. Note=Two different mutations, one at the splice donor site of intron 2 and the other at the splice acceptor site for exon 3, have been identified. Both mutations give rise to a truncated protein.
  • Sequence similaritiesContains 1 Ig-like C2-type (immunoglobulin-like) domain.
    Contains 1 ITAM domain.
  • Post-translational
    Phosphorylated on tyrosine, serine and threonine residues upon B-cell activation. Phosphorylation of tyrosine residues by Src-family kinases is an early and essential feature of the BCR signaling cascade. The phosphorylated tyrosines serve as docking sites for SH2-domain containing kinases, leading to their activation which in turn leads to phosphorylation of downstream targets. Phosphorylation of serine and threonine residues may prevent subsequent tyrosine phosphorylation.
  • Cellular localizationCell membrane. Following antigen binding, the BCR has been shown to translocate from detergent-soluble regions of the cell membrane to lipid rafts although signal transduction through the complex can also occur outside lipid rafts.
  • Information by UniProt
  • Database links
  • Alternative names
    • B lymphocyte-specific MB1 protein antibody
    • B-cell antigen receptor complex-associated protein alpha chain antibody
    • CD 79a antibody
    • CD79a antibody
    • CD79a antigen (immunoglobulin-associated alpha) antibody
    • CD79A antigen antibody
    • CD79a molecule, immunoglobulin-associated alpha antibody
    • CD79A_HUMAN antibody
    • Ig alpha antibody
    • Ig-alpha antibody
    • IGA antibody
    • IgM-alpha antibody
    • Immunoglobulin-associated alpha antibody
    • Ly54 antibody
    • MB-1 membrane glycoprotein antibody
    • MB1 antibody
    • Membrane-bound immunoglobulin-associated protein antibody
    • Surface IgM-associated protein antibody
    see all

Anti-CD79a antibody images

  • Human tonsil stained with ab5691.

References for Anti-CD79a antibody (ab5691)

This product has been referenced in:
  • Lopez D  et al. Mapping hematopoiesis in a fully regenerative vertebrate: the axolotl. Blood 124:1232-41 (2014). Read more (PubMed: 24802774) »
  • Cuttica MJ  et al. Perivascular T-cell infiltration leads to sustained pulmonary artery remodeling after endothelial cell damage. Am J Respir Cell Mol Biol 45:62-71 (2011). IHC-P ; Mouse . Read more (PubMed: 20813993) »

See all 2 Publications for this product

Product Wall

Tonsil is the best positive control for this antibody as the antibody was characterized on tonsil (please see the image on the online datasheet). You can also try spleen as a positive control. For a negative control I can suggest kidney, muscle, skin, ...

Read More