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Home >> Antibodies >> CD23 (Fc Epsilon RII)

CD23 (Fc Epsilon RII)

Biotinylated Mouse Monoclonal Antibody [Clone FCER2/3592]

Catalog #


0.5 ml at 100ug/ml

Price (USD)



Purified Ab conjugated to Biotin

Catalog No


0.5 ml at 100ug/ml


Purified Ab conjugated to Biotin

Price (USD)


Formalin-fixed, paraffin-embedded human tonsil stained with Biotin-conjugated CD23 Mouse Monoclonal Antibody (FCER2/3592).


SDS-PAGE Analysis Purified CD23 Mouse Monoclonal Antibody (FCER2/3592) (unconjugated). Confirmation of Purity and Integrity of Antibody.


Analysis of Protein Array containing more than 19,000 full-length human proteins using Monospecific CD23 Mouse Monoclonal Antibody (FCER2/3592).

Product Details


BLAST-2; C-type lectin domain family 4, member J; CD23; Fc fragment of IgE low affinity II receptor; Fc-epsilon-RII; FCER2; FCER2A; FceRII; IgE-binding factor (IGEBF); Immunoglobulin E receptor, low affinity II; Lymphocyte IgE receptor

Positive Control

Human lymph node or tonsil (IHC).

Known Applications & Suggested Dilutions

IHC-P         More Details

Immunohistochemistry (Formalin-fixed) (2-4ug/ml for 30 minutes at RT)
(Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95 °C followed by cooling at RT for 20 minutes)
Optimal dilution for a specific application should be determined.


Recombinant fragment (around aa 48-321) of human FCER2/CD23 protein (exact sequence is proprietary)

Cellular Localization

Cell Surface

Species Reactivity


Host / Ig Isotype

Mouse / IgG2b, kappa

Mol. Weight of Antigen

37kDa (soluble form); 45kDa (membrane-bound form)

Specificity & Comments

CD23 (FCE2) is a type II integral membrane glycoprotein that is expressed on mature B cells, monocytes, eosinophils, platelets and dendritic cells. CD23 is a low affinity IgE receptor that mediates IgE-dependent cytotoxicity and phagocytosis by macrophages and eosinophils. CD23 associates as an oligomer where cooperative binding of at least two lectin domains is required for high affinity IgE binding to CD23. It may play a role in antigen presentation by B cells by interacting with CD40. CD23 has been shown to be associated with the Fyn tyrosine kinase. The truncated molecule can be secreted, then function as a potent mitogenic growth factor. CD23 is expressed on a subpopulation of peripheral blood cells, B-lymphocytes and on EBV transformed B lymphoblastoid cell lines. CD23 is also detected in neoplastic cells from cases of B cell chronic lymphocytic leukemia and some cases on centroblastic/centrocytic lymphoma.

Related Products

Antibody purified from Bioreactor Concentrate by Protein A/G and conjugated to Biotin. Prepared in 10mM PBS with 0.05% BSA and 0.05% azide.

Key References

  1. Kaiserlian D,et al. Intestinal epithelial cells express the CD23/FceRII molecule:enhanced expression in enteropathies. Immunology.80:90-95(1993).


  •  Entrez Gene ID: 2208
  •  Gene Symbol: FCER2
  •  SwissProt: P06734
  •  Chromosome Location: 19p13.3
  •  Unigene: 465778