Human FCRL3/FcRH3 Antibody

Catalog # Availability Size / Price Qty
Detection of FCRL3/FcRH3 in Human Blood Lymphocytes by Flow Cytometry.
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Product Details
Citations (1)
Supplemental Products

Human FCRL3/FcRH3 Antibody Summary

Species Reactivity
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.
Monoclonal Mouse IgG1 Clone # 546828
Protein A or G purified from hybridoma culture supernatant
Mouse myeloma cell line NS0-derived recombinant human FCRL3/FcRH3
Accession # Q96P31
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Flow Cytometry
2.5 µg/106 cells
See below
Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

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.

Scientific Data

Flow Cytometry Detection of FCRL3/FcRH3 antibody in Human Blood Lymphocytes antibody by Flow Cytometry. View Larger

Detection of FCRL3/FcRH3 in Human Blood Lymphocytes by Flow Cytometry. Human peripheral blood lymphocytes were stained with Mouse Anti-Human FCRL3/FcRH3 Monoclonal Antibody (Catalog # MAB3126) followed by Allophycocyanin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0101B) and Mouse Anti-Human NKp46/NCR1 PE-conjugated Monoclonal Antibody (Catalog # FAB1850P). Quadrant markers were set based on control antibody staining (Catalog # MAB002).

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

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).

  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

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Citation for Human FCRL3/FcRH3 Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. MAIA, Fc receptor-like 3, supersedes JUNO as IZUMO1 receptor during human fertilization
    Authors: J Vondrakova, M Frolikova, L Ded, J Cerny, P Postlerova, V Palenikova, O Simonik, Z Nahacka, K Basus, E Valaskova, R Machan, A Pacey, Z Holubcova, P Koubek, Z Ezrova, S Park, R Liu, R Partha, N Clark, J Neuzil, M Ikawa, K Erickson, KS Lam, H Moore, K Komrskova
    Science Advances, 2022;8(36):eabn0047.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Immunoprecipitation


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