Human FCRL3/FcRH3 Alexa Fluor® 594-conjugated Antibody

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FAB3126T-100UG
R&D Systems Antibodies
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Human FCRL3/FcRH3 Alexa Fluor® 594-conjugated Antibody Summary

Species Reactivity
Human
Specificity
Detects human FCRL3/FcRH3 in direct ELISAs. In direct ELISAs, less than 5% cross-reactivity with recombinant human (rh) FCRL2 and rhFCRL5 is observed, and no cross-reactivity with rhFCRL1 or recombinant mouse FCRL3 is observed.
Source
Monoclonal Mouse IgG1 Clone # 546828
Immunogen
Mouse myeloma cell line NS0-derived recombinant human FCRL3/FcRH3
Arg14-Arg569
Accession # Q96P31
Formulation
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Label
Alexa Fluor 594 (Excitation= 590 nm, Emission= 617 nm)

Applications

Recommended Concentration
Sample
Flow Cytometry
0.25-1 µg/106 cells
Human peripheral blood lymphocytes

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: FCRL3/FcRH3

FCRL3 (Fc Receptor-Like 3), also known as FcRH3, IRTA3, and SPAP2, is a 110 kDa molecule with sequence homology to classical Fc receptors. The type 1 transmembrane FCRL proteins contain from three to nine immunoglobulin-like domains. They are differentially expressed within the B cell lineage and can either promote or inhibit B cell proliferation and activation (1). Mature human FCRL3 consists of a 556 amino acid (aa) extracellular domain (ECD) with six Ig-like domains, a 21 aa transmembrane segment, and a 140 aa cytoplasmic domain with four immunotyrosine inhibitory motifs (ITIMs) (2-4). Within the ECD, human and mouse FCRL3 share 35% aa sequence identity. Alternate splicing generates several additional isoforms with deletions or substitutions in both the extracellular and intracellular regions. These include potentially secreted forms that are truncated following the second Ig-like domain (4). FCRL3 is expressed in secondary lymphoid organs on the surface of mature naïve and memory B cells, NK cells, and B cell lines derived from chronic lymphocytic leukemias (2, 3, 5). It is upregulated on B cells following LPS or anti-CD40 stimulation (6). A polymorphism in the FCRL3 promoter induces enhanced transcription and is associated with the development of autoimmune disorders in a Japanese population (6, 7). Tyrosine phosphorylation within the ITIMs of FCRL3 enables its association with SHP-1 (4).

References
  1. Davis, R.S. (2007) Annu. Rev. Immunol. 25:525.
  2. Miller, I. et al. (2002) Blood, 99:2662.
  3. Davis, R.S. et al. (2001) Proc. Natl. Acad. Sci. 98:9772.
  4. Xu, M.-J. et al. (2002) Biochem. Biophys. Res. Commun. 293:1037.
  5. Polson, A.G. et al. (2006) Int. Immunol. 18:1363.
  6. Kochi, Y. et al. (2005) Nat. Genet. 37:478.
  7. Chistiakov, D.A. and A.P. Chistiakov (2007) Hum. Immunol. 68:375.
Long Name
Fc Receptor-like 3
Entrez Gene IDs
115352 (Human); 329693 (Mouse); 680697 (Rat)
Alternate Names
CD307c; Fc receptor homolog 3; Fc receptor-like 3; Fc receptor-like protein 3; FcRH3; FCRL3; fcR-like protein 3; hIFGP3; IFGP3; immunoglobulin superfamily receptor translocation associated protein 3; IRTA3; SPAP2

Product Datasheets

Product Specific Notices


This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.

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