Name : Human SIRP Gamma/CD172g Protein

Product Source :
Recombinant Human SIRP Gamma/CD172g Protein is expressed from HEK293 with His tag and Avi tag at the C-Terminus. It contains Glu29-Pro360.[Accession | Q9P1W8]

Molecular Weight :
The protein has a predicted MW of 39.7 kDa. Due to glycosylation, the protein migrates to 45-52 kDa based on Tris-Bis PAGE result.

Endotoxin Level :
Less than 1EU per μg by the LAL method.

Purity :
> 95% as determined by Tris-Bis PAGE> 95% as determined by HPLC

Formulation :
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.

Reconstitution :
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.

Storage and Stability :
-20 to -80°C for 12 months as supplied from date of receipt. -80°C for 3-6 months after reconstitution. 2-8°C for 2-7 days after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

Product Concentration :
Tris-Bis PAGE Human SIRP Gamma on Tris-Bis PAGE under reduced conditions. The purity is greater than 95%.. SEC-HPLC The purity of Human SIRP Gamma is greater than 95% as determined by SEC-HPLC. ELISA Data Immobilized Human SIRP Gamma, His Tag at 5μg/ml (100μl/well) on the plate. Dose response curve for Human CD47, hFc Tag with the EC50 of 2.46μg/ml determined by ELISA.

Background :
Signal regulatory protein gamma (SIRP gamma, designated CD172g), also called SIRP beta 2, is a monomeric 45-47 kDa type I transmembrane protein belonging to the SIRP/SHPS (CD172) family of the Ig superfamily.SIRP gamma is probable immunoglobulin-like cell surface receptor. On binding with CD47, mediates cell-cell adhesion. Engagement on T-cells by CD47 on antigen-presenting cells results in enhanced antigen-specific T-cell proliferation and costimulates T-cell activation.

Synonyms :
CD172g; FLJ42230; SIRP beta 2; SIRP gamma; SIRP-B2; SIRPG; Cripto-1; bA77C3.1; SIRP β 2

References & Citations :
(1)Piccio, L. Adhesion of human T cells to antigen-presenting cells through SIRP beta2-CD47 interaction costimulates T-cell proliferation[J]. Blood, 2005, 105(6):2421-2427.

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