SRP-HM272-100μg / 询价
SRP-HM272-500μg / 询价
SRP-HM272-500μgx2 / 询价
Human SIRP alpha/CD172a Protein
Recombinant Human SIRP alpha/CD172a Protein is expressed from HEK293 with hFc tag at the C-Terminus.It contains Glu31-Arg370 [Accession | P78324-1].
The protein has a predicted MW of 64.1 kDa. Due to glycosylation, the protein migrates to 78-90 kDa based on Bis-Tris PAGE result.
> 95% as determined by Bis-Tris PAGE
> 95% as determined by SEC-HPLC
Less than 1EU per μg by the LAL method.
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.
-20 to -80°C for 12 months as supplied from date of receipt.
-80°C for 3 months after reconstitution.
Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
Human SIRP alpha on Bis-Tris PAGE under reduced condition. The purity is greater than 95%.
The purity of SIRP alpha is greater than 95% as determined by SEC-HPLC.
Immobilized Human CD47, His Tag at 2μg/ml (100μl/well) on the plate. Dose response curve for Human SIRP alpha, hFc Tag with the EC50 of 82.1ng/ml determined by ELISA (QC Test).
Immobilized Human SIRP alpha, hFc Tag at 0.5μg/ml (100μl/Well) on the plate. Dose response curve for Biotinylated Anti-SIRP alpha Antibody, hFc Tag with the EC50 of 26.9ng/ml determined by ELISA.
Human CD47, His Tag captured on CM5 Chip via Anti-His Antibody can bind Human SIRP alpha, hFc Tag with an affinity constant of 18.9nM as determined in SPR assay (Biacore T200).
Signal regulatory protein α (SIRPα) is a regulatory membrane glycoprotein from SIRP family expressed mainly by myeloid cells and also by stem cells or neurons.SIRPα acts as inhibitory receptor and interacts with a broadly expressed transmembrane protein CD47 also called the "don´t eat me" signal.Cancer cells highly expressed CD47 that activate SIRP α and inhibit macrophage-mediated destruction.
CD172a; BIT; MFR; MYD1; MYD-1; P84; PTPNS1; SHPS1; SHPS-1; SIRP alpha; SIRPA;
(1)Weiskopf K , Ring A M , Ho C C M , et al. Engineered SIRP? Variants as Immunotherapeutic Adjuvants to Anticancer Antibodies[J]. Science, 2013, 341(6141):88-91.
