C2440-02D2
CD89 (CD89 Antigen, FCAR, Immunoglobulin alpha Fc Receptor, IgA Fc Receptor) (PE)
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£1,050.00
- SKU:
- C2440-02D2
- Anwendung:
- Flow Cytometry
- Reinheit:
- Purified
- Lagerbedingungen:
- 4°C Do Not Freeze
- Hersteller:
- United States Biological
- Host:
- Mouse
- Immunogen:
- Recombinant protein corresponding to soluble human Fc alpha R
- Klon:
- MIP8a
- Format:
- Supplied as a lyophilized powder in PBS, 1% BSA, 0.09% sodium azide. Reconstitute with 1ml sterile ddH2O. Labeled with R-Phycoerythrin (PE).
- Weitere Details:
- FCAR, also called FcαRI or CD89, is a variably glycosylated 50-100 kD myeloid-specific type I transmembrane (TM) Fc receptor for IgA that is a member of the multichain immune recognition receptor (MIRR) family. Human FCAR contains a 21 amino acid (aa) signal sequence and extracellular (ECD), TM and cytoplasmic domains of 206, 19 and 41 aa, respectively. Arg230 within the TM domain supports interaction with the ITAM-containing signaling subunit, FcRγ, which contains a TM Asp. 5-7 Two ECD C2-type Ig-like domains (EC1 and 2) are oriented at right angles. Up to two molecules of FCAR can bind one molecule of serum IgA via EC1. Many splice variants have been reported, but only two have been identified as proteins. The a.2 form, which lacks 22aa just prior to the TM domain, is exclusively expressed in alveolar macrophages. The a.3 form lacks EC2. FCAR binds monomeric, polymeric and secretory IgA, but does not mediate the barrier function of secretory IgA in mucosal epithelium. Shedding and circulation of polymeric IgA/FCAR immune complexes has been reported. Circulating neutrophils, eosinophils, and monocytes express FCAR. Tissue expression of FCAR is mainly from neutrophils; FCAR is downregulated as monocytes differentiate to tissue macrophages. On neutrophils, a significant amount of FCAR lacks FcRγ, but can still be endocytosed to early endosomes and recycled to the cell surface. Binding of serum IgA to FCAR is transient and anti- inflammatory, inhibiting IgG or IgE-induced degranulation. Sustained aggregation of FCAR results in inflammatory responses. FcRγ signaling is required for these and for transport to late endosomes. Human FCAR shows 55-58% aa identity with rat, horse and cow FCAR. No ortholog occurs in mouse. FCAR structure resembles the KIR/ILT/LIR/MIR family more than other IgA receptors, including pIgR, Fcα/uR, asialoglycoprotein receptor (ASGR1) and transferrin receptor (TfR). Applications: Suitable for use in Flow Cytometry. Other applications not tested. Recommended Dilution: Flow Cytometry: Neat; 10ul labels 10e6 cells or 100ul whole blood. Optimal dilutions to be determined by the researcher. Storage and Stability: Store product at 4°C before and after reconstitution. DO NOT FREEZE! Lyophilized and reconstituted products are stable for 12 months at 4°C after receipt. Reconstitute lyophilized powder with sterile ddH2O prior to use and store remainder as an undiluted liquid. Dilute required amount only prior to immediate use. Further dilutions can be made in assay buffer. Caution: PE conjugates are sensitive to light. For maximum recovery of product centrifuge the original vial prior to removing the cap.
- Versandbedingungen:
- Blue Ice