Anti-FCER2 antibody produced in rabbit

enhanced validation

Prestige Antibodies® Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution

Anti-Immunoglobulin E-binding factor, Anti-Fc-epsilon-RII, Anti-Low affinity immunoglobulin epsilon Fc receptor, Anti-Lymphocyte IgE receptor, Anti-BLAST-2, Anti-CD23 antigen
Human Protein Atlas Number:
Pricing and availability is not currently available.

biological source


antibody form

affinity isolated antibody

antibody product type

primary antibodies



product line

Prestige Antibodies® Powered by Atlas Antibodies


buffered aqueous glycerol solution

species reactivity



antibody small pack of 25 μL

enhanced validation

orthogonal RNAseq
recombinant expression
Learn more about Antibody Enhanced Validation


immunoblotting: 0.04-0.4 μg/mL
immunohistochemistry: 1:50-1:200

immunogen sequence




UniProt accession no.

shipped in

wet ice

storage temp.


Gene Information

human ... FCER2(2208)

General description

FCER2 (Fc fragment of IgE receptor II) gene is localized to 19p13.3, spans ~13kb, and is composed of 11 exons. The encoded protein is a low-affinity glycoprotein receptor for immunoglobulin E (IgE). This protein is composed of a single chain and has a molecular weight of 36kDa. It shares high homology with multiple lectins. It exists as two isoforms due to alternative splicing, which differ in their cytoplasmic N-terminals. It is also commonly known as CD23 (cluster of differentiation 23).


Low affinity immunoglobulin epsilon Fc receptor recombinant protein epitope signature tag (PrEST)


All Prestige Antibodies Powered by Atlas Antibodies are developed and validated by the Human Protein Atlas (HPA) project (www.proteinatlas.org)and as a result, are supported by the most extensive characterization in the industry.

The Human Protein Atlas project can be subdivided into three efforts: Human Tissue Atlas, Cancer Atlas, and Human Cell Atlas. The antibodies that have been generated in support of the Tissue and Cancer Atlas projects have been tested by immunohistochemistry against hundreds of normal and disease tissues and through the recent efforts of the Human Cell Atlas project, many have been characterized by immunofluorescence to map the human proteome not only at the tissue level but now at the subcellular level. These images and the collection of this vast data set can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.

Biochem/physiol Actions

FCER2 (Fc fragment of IgE receptor II) gene is thought to have regulatory functions in atopic disorders based on its chromosomal location. This receptor controls the production of IgE on B-cells. It is dependent on Ca2+, which causes structural changes in FCER2, which leads to an increased affinity of FCER2 to immunoglobulin (Ig)E. Heightened levels of serum CD23 is linked with increased risk of non-Hodgkin lymphoma. Studies in Xakriabá indigenous community from Brazil shows that the immune-dependent release of nitric oxide (NO) in a CD23-IgE-mediated manner is a hallmark of patients with localized cutaneous leishmaniasis (LCL).

Features and Benefits

Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.

Every Prestige Antibody is tested in the following ways:
  • IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
  • Protein array of 364 human recombinant protein fragments.


Corresponding Antigen APREST71729.

Physical form

Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide

Legal Information

Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Daopeng Yuan et al.
The Journal of biological chemistry, 288(30), 21667-21677 (2013-06-19)
Immunoglobulin E (IgE) antibodies play a fundamental role in allergic disease and are a target for therapeutic intervention. IgE functions principally through two receptors, FcεRI and CD23 (FcεRII). Minute amounts of allergen trigger mast cell or basophil degranulation by cross-linking...
Elevated serum sCD23 and sCD30 up to two decades prior to diagnosis associated with increased risk of non-Hodgkin lymphoma.
M P Purdue et al.
Leukemia, 29(6), 1429-1431 (2015-01-09)
R Carvalho-Gontijo et al.
Scandinavian journal of immunology, 81(6), 515-524 (2015-03-25)
In this study, we described, for the first time, specific aspects of an anti-Leishmania immune response in a Brazilian Xakriabá indigenous community. Induction of an intracellular NO pathway, triggered by the binding of IgE to CD23 receptor in IFN-γ/IL-4 cytokines...
T Laitinen et al.
American journal of respiratory and critical care medicine, 161(3 Pt 1), 700-706 (2000-03-11)
On the basis of studies with animal models, the gene for the low-affinity receptor for immunoglobulin E (IgE) (FCER2, CD23) has been implicated as a candidate for IgE-mediated allergic diseases and bronchial hyperreactivity, or related traits. Given evidence for genetic...
Marcia A Chan et al.
American journal of respiratory cell and molecular biology, 50(2), 263-269 (2013-09-10)
CD23 is the low-affinity Fc receptor for IgE. When expressed on B cells, CD23 appears to play a role in regulation of IgE synthesis. Polymorphisms within FCER2, the gene encoding CD23, have been associated with atopy, increased risk of exacerbations...

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