Human Fc gamma  RIIIB/CD16b Alexa Fluor® 594-conjugated Antibody

    
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  • Species Reactivity
    Human
  • Specificity
    Detects human Fc gamma RIIIB/CD16b in direct ELISAs and Western blots. In Western blots, no cross-reactivity with recombinant human Fc gamma RIIA or recombinant mouse Fc gamma RIII is observed. In flow cytometry of whole blood, recognition of Fc gamma RIIIB on the granulocyte population, but not Fc gamma RIIIA on NK cells, is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 245514
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Fc gamma RIIIB/CD16b
    Thr20-Gln208
    Accession # O75015
  • Formulation
    Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 594
Product Datasheets

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Applications
  •  
    Recommended
    Concentration
    Sample
  • Flow Cytometry
    0.25-1 µg/106 cells
    See below
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.
Data Example
Detection of Fc gamma RIIIB/CD16b in Human Peripheral Blood Granulocytes by Flow Cytometry. Human peripheral blood granulocytes were stained with Mouse Anti-Human Fc gamma RIIIB/CD16)b Alexa Fluor® 594‑conjugated Monoclonal Antibody (Catalog # FAB1597T, filled histogram) or Mouse IgG2B Alexa Fluor 594 Isotype Control (Catalog # IC0041T, open histogram). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: Fc gamma RIIIB/CD16b

Receptors for the Fc region of IgG (Fc gamma R) are members of the Ig superfamily. Based on their genetic organization and molecular structure, three classes of human Fc gamma Rs: RI (CD64), RII (CD32), and RIII (CD16), which generate multiple isoforms, are recognized (1‑3). These receptors function in the activation or inhibition of immune responses. The activating-type receptor either has, or associates non-covalently with an accessory subunit (FcR gamma or zeta  chain) that has an immunoreceptor tyrosine-based activation motif (ITAM) in its cytoplasmic domain. In contrast, the inhibitory receptor (Fc gamma RIIB) has a built-in immunoreceptor tyrosine-based inhibitory motif (ITIM) in its own cytoplasmic domain. Fc gamma RI is a high-affinity receptor that binds monomeric IgG. Both Fc gamma RII and RIII are low-affinity receptors that bind IgG in the form of immune complexes. Two genes for human Fc gamma RIII, A and B, encoding a transmembrane receptor and a glycosylphosphatidylinositol (GPI) anchored protein, respectively, have been identified. Three allelic variants of Fc gamma RIIIB, NA-1, NA-2, and SH, exist. A soluble form of Fc gamma RIIIB corresponding to the extracellular region of the receptor is produced by proteolytic cleavage and circulates in plasma and other body fluids. The extracellular domains of Fc gamma RIIIA and B share 97% amino acid sequence homology. Whereas Fc gamma RIIIA is expressed on most effector cells of the immune system including macrophage, monocyte, NK cells, mast cells, eosinophils, dendritic cells, and Langerhans cells, Fc gamma RIIIB is selectively expressed in neutrophils and eosinophils. Signaling through Fc gamma RIIIA results in oxidative burst, cytokine release and phagocytosis by macrophages, antibody-dependent cellular cytotoxicity by natural killer cells and degranulation of mast cells. By contrast, Fc gamma RIIIB is a decoy receptor that binds IgG complexes without triggering activation. Soluble Fc gamma RIIIB has a regulatory role in inflammatory processes (4). It interacts with complement receptors CR3 and CR4 on monocytes to induce the production of pro-inflammatory cytokines.

  • References:
    1. van de Winkel, J. and P. Capes (1993) Immunol. Today 14:215.
    2. Ravetch, J.V. and S. Bolland (2001) Annu. Rev. Immunol. 19:275.
    3. Takai, T. (2002) Nature Rev. Immunol. 2:580.
    4. Gauchat, G.J. et al. (1996) J. Immunol. 157:1184.
  • Long Name:
    Fc gamma Receptor III
  • Entrez Gene IDs:
    2215 (Human); 14131 (Mouse)
  • Alternate Names:
    CD16; CD16b antigen; CD16b; Fc fragment of IgG, low affinity IIIb, receptor (CD16b); Fc fragment of IgG, low affinity IIIb, receptor for (CD16); Fc gamma RIIIB; FCG3; Fc-gamma receptor IIIb (CD 16); Fc-gamma RIII; Fc-gamma RIIIb; Fc-gamma RIII-beta; FCGR3; FCGR3B; FcgRIIIB; FcR-10; fcRIII; FCRIIIB; IGFR3; IgG Fc receptor III-1; low affinity immunoglobulin gamma Fc region receptor III-B
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Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG2B Alexa Fluor® 594-conjugated Isotype Control

Ctrl IC0041T
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Staining Reagents
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Flow Cytometry Staining Buffer (1X)

Flow FC001 7
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Flow Cytometry Mouse Lyse Buffer (10X)

Flow FC003 5
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Flow Cytometry Human Lyse Buffer (10X)

Flow FC002 1
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