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Biotinylated Human Fc gamma RIIIB / CD16b (NA1), His Tag & Avi Tag (Avitag™)  pdf  pdf  pdf


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Synonym

FCGR3B,CD16B,FCG3B,FCGR3,FCG3,IGFR3

Source

MABSol® Biotinylated Human Fc gamma RIIIB / CD16b (NA1), His Tag (CDB-H82E4) is expressed from human HEK293 cells. It contains AA Gly 17 - Ser 200 (Accession # AAA35881.1). The NA1 form of the CD16B (CDB-H82E4 / CDB-H5227) differ with the NA2 form of CD16B in AA20, 49, 66, and 90. The NA1 form carries R20, N49, D66, and V90, while the NA2 form (CDB-H5222 / CDB-H82E1) carries S20, S49, N66, and I90.

Predicted N-terminus: Gly 17

Molecular Characterization

CD16b (NA1)(Gly 17 - Ser 200)AAA35881.1
Poly-his
Avi

This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag.

The protein has a calculated MW of 24.6 kDa. The protein migrates as 38-48 KDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Biotinylation

Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.

Biotin:Protein Ratio

The biotin to protein ratio is 0.5-1 as determined by the HABA assay.

Endotoxin

Less than 1.0 EU per μg by the LAL method.

Purity

>95% as determined by SDS-PAGE.

Formulation

Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

Contact us for customized product form or formulation.

Reconstitution

Please see Certificate of Analysis for specific instructions.

For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

Storage

For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Please avoid repeated freeze-thaw cycles.

No activity loss is observed after storage at:

  1. 4-8°C for 12 months in lyophilized state;
  2. -70°C for 3 months under sterile conditions after reconstitution.
 

SDS-PAGE

Biotinylated Human Fc gamma RIIIB / CD16b (NA1), His Tag  (Cat. No. CDB-H82E4) SDS-PAGE gel

Biotinylated Human Fc gamma RIIIB / CD16b (NA1), His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

 

Background

CD16 is a low affinity Fc receptor, and has been identified as Fc receptors FcγRIIIa (CD16a) and FcγRIIIb (CD16b). These receptors bind to the Fc portion of IgG antibodies. CD16 encoded by two different highly homologous genes in a cell type-specific manner.CD16 is found on the surface of natural killer cells, neutrophil polymorphonuclear leukocytes, monocytes and macrophages. CD16B is also kown as FCGR3B and FCG3B, is expressed specifically by polymorphonuclear leukocytes (neutrophils) and stimulated eosinophils. CD16B is the low affinity receptor for the Fc region of immunoglobulins gamma. FCGR3B binds complexed or aggregated IgG and also monomeric IgG. Contrary to III-A, FCG3B is not capable to mediate antibody-dependent cytotoxicity and phagocytosis. CD16B may serve as a trap for immune complexes in the peripheral circulation which does not activate neutrophils.

References

Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.


Limited Use License

The Biotin AviTag technology is covered by U.S. Pat. No: 5,874,239 and includes any and all materials, methods, kits and related derivatives claimed by this patent. The purchase of the Acrobiosystems’s Avitag™ proteins confers to the purchaser the limited right to use the Avitag™ technology for non-commercial, or research use, or for purposes of evaluating the Avitag™ technology.

Commercial use of the Avitag™ technology to manufacture a commercial product, or use of the Avitag™ technology to facilitate or advance research which will be applied to the development of a commercial product requires a license from Avidity, LLC. Examples of Commercial use include, but are not limited to biosensors, diagnostics, therapeutic applications, proximity assays, and drug screening assays.

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