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Safety Data Sheet (SDS) PE Anti-mouse FcepsilonRIalpha Antibody     Product Data Sheet (PDF)    
PE Anti-mouse FcεRIα Antibody
1271535 50 µg $95.00       
1271540 200 µg $290.00       
Clone: MAR-1
Isotype: Armenian Hamster IgG
Reactivity: Mouse
Formulation: Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
Preparation: The antibody was purified by affinity chromatography, and conjugated with PE under optimal conditions. The solution is free of unconjugated PE and unconjugated antibody.
Concentration: 0.2 mg/ml
Storage & Handling: The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

FC - Quality tested

Application Notes:

Additional reported applications (for relevant formats of this clone) include: depletion2, immunohistochemistry of frozen sections (OCT embedded2).

Recommended Usage:

Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤0.25 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.

Application References:

1. Obata K, et al. 2007. Blood 110:913 (FC)
2. Sokol CL, et al. 2008. Nat. Immunol. 9:310 (FC, Deplete, IHC)
3. Chen J, et al. 2009. J. Biol. Chem.. 284:5763 (FC)
4. Shade KT, et al. 2015. J Exp Med. 212:457. PubMed

Mouse mast cell line MC/9

Mouse mast cell line MC/9 stained with MAR-1 PE


FcεRIα is a transmembrane protein belonging to the Ig superfamily. FcεRIα forms a tetrameric complex with one β and two γ-subunits. The FcεRI complex plays an important role in triggering IgE-mediated allergic reactions. It is abundantly expressed on mast and basophils and up-regulated by the presence of IgE. Following stimulation via FcεRIα, mast cells and basophils release bioactive chemical mediators such as histamine, resulting in the initiation of allergic reactions. Cross linking of the high-affinity receptor for IgE on tissue mast cells triggers immediate hypersensitivity with local symptoms. The MAR-1 monoclonal antibody reacts with the FcεRIα subunit.

Other Names: FceRIa, FceRI-α, high affinity IgE receptor
Structure: A transmembrane protein of Ig super family member
Distribution: Expressed on mast and basophils.
Function: Play an important role in triggering IgE-mediated allergic reactions.
Ligand Receptor: IgE
Antigen References:

1. Arinobu Y, et al. 2005. P. Natl. Acad. Sci. USA 102:18105.
2. Yamaguchi M, et al. 2001. Int. Immunol. 13:843.