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Recombinant Human Fc gamma RIIIB/CD16b His Avi Protein, CF

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Recombinant Human Fc gamma RIIIB/CD16b His-tag Avi-tag Protein (Catalog # AVI11507) binds Human IgG with an ED50 of 60.0-720 ng/mL.
2 μg/lane of Recombinant Human Fc gamma RIIIB/CD16b His-tag Avi-tag Protein (Catalog # AVI11507) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue ...read more

Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

Order Details

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Recombinant Human Fc gamma RIIIB/CD16b His Avi Protein, CF Summary

Additional Information
His-tag Avi-tag
Details of Functionality
Measured by its binding ability in a functional ELISA.<br />Recombinant Human Fc gamma RIIIB/CD16b His-tag Avi-tag (Catalog # AVI11507) binds Human IgG with an ED<sub>50</sub> of 60.0-720 ng/mL.<br /><br />
Accession #
N-terminal Sequence
Gly17
Structure / Form
Biotinylated via Avi-tag
Protein/Peptide Type
Recombinant Proteins
Endotoxin Note
<0.100 EU per 1 µg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
24 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
39-63 kDa, under reducing conditions.

Packaging, Storage & Formulations

Storage
Store the unopened product at -20 to -70 °C. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. Do not use past expiration date.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Instructions
Reconstitute at 500 μg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human Fc gamma RIIIB/CD16b His Avi Protein, CF

  • 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

Background

Receptors for the Fc region of IgG (Fc gamma R) are members of the Ig superfamily. Based on the genetic organization and molecular structure of receptors for the Fc region of IgG (Fc gamma R), 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 region of Fc gamma RIIIB share 62% and 59% sequence homology with the mouse and rat variants, respectively. The extracellular domains of human 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.  Our Avi-tag Biotinylated Human Fc gamma RIIIB His-tag features biotinylation at a single site contained within the Avi-tag, a unique 15 amino acid peptide. Protein orientation will be uniform when bound to streptavidin-coated surface due to the precise control of biotinylation and the rest of the protein is unchanged so there is no interference in the protein's bioactivity.
  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.

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