Recombinant Human Fc gamma RIIA/CD32a (H167) Protein, CF

Catalog # Availability Size / Price Qty
9595-CD-050
Recombinant Human Fc gamma RIIA/CD32a (H167) Protein Bioactivity
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Recombinant Human Fc gamma RIIA/CD32a (H167) Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. When Recombinant Human Fc gamma  RIIA/CD32a (H167) is coated at 1 μg/mL, 100 μL/well, it binds to human IgG with an ED50 of 0.25‑1.25 μg/mL.
Source
Mouse myeloma cell line, NS0-derived human Fc gamma RIIA/CD32a protein
Gln34-Ile218, with a C-terminal 10-His tag
Accession #
N-terminal Sequence
Analysis
Ala36 identified. Gln34 inferred from enzymatic pyroglutamate treatment revealing Ala35 
Predicted Molecular Mass
22 kDa
SDS-PAGE
25-37 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

9595-CD

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Data Image

Bioactivity Recombinant Human Fc gamma RIIA/CD32a (H167) Protein Bioactivity View Larger

When Recombinant Human Fc gamma RIIA/CD32a (H167) (Catalog # 9595-CD) is coated at 1 μg/mL, 100 μL/well, it binds to human IgG with an ED50 of 0.25-1.25 μg/mL.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: Fc gamma RIIA/CD32a

Receptors for the Fc region of IgG (Fc gamma R) are members of the Ig superfamily that function in the activation or inhibition of immune responses. Three classes of human Fc gamma Rs: RI (CD64), RII (CD32), and RIII (CD16), which generate multiple isoforms, are recognized (1-3). 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, and Fc gamma RII and RIII are low-affinity receptors that bind aggregated or immune complexed IgG (IC). The extracellular domain of human Fc gamma RIIA shares approximately 90% amino acid sequence homology with human Fc gamma RIIB and Fc gamma RIIC. Fc gamma RIIA is expressed on many immune cell types (macrophage, neutrophil, eosinophils, platelets, dendritic cells and Langerhan cells) where inhibitory ITIM-bearing receptors may also be co-expressed and co-engaged by specific ligands. Signaling through Fc gamma RIIA results in the initiation of inflammatory responses (cytolysis, phagocytosis, degranulation and cytokine production) that can be modulated by signals from the inhibitory receptors. The strength of the signal is dependent on the ratio of expression of the activating and inhibitory receptors. Besides IC, Fc gamma RII A also binds C-reactive protein (CRP) (4, 5). Two allelic variants (R167 and H167) of Fc gamma RIIA that differ in their ability to ligate human IgG2 or CRP exist. The H167 allele has been found to have a protective effect against lupus nephritis.

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. Chi, M. et al. (2002) J. Immunol. 168:1413.
  5. Zuniga, R. et al. (2003) Arthritis Rheum. 48:460.
Long Name
Fc gamma Receptor II A
Entrez Gene IDs
2212 (Human); 14130 (Mouse); 116591 (Rat); 102143568 (Cynomolgus Monkey)
Alternate Names
CD32 antigen; CD32a; CD32MGC23887; CDw32fc-gamma-RIIa; Fc fragment of IgG, low affinity IIa, receptor (CD32); Fc fragment of IgG, low affinity IIa, receptor for (CD32); Fc gamma RIIA; FCG2; Fc-gamma RII-a; Fc-gamma-RIIa; FcGR; FCGR2; FCGR2A; FCGR2A1; FcgRIIA; FCRIIA; fcRII-a; IGFR2MGC30032; IgG Fc receptor II-a; Immunoglobulin G Fc receptor II; low affinity immunoglobulin gamma Fc region receptor II-a

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