>Immune Checkpoint Proteins
>Human CD172A /SIRP alpha /SHPS1 Protein
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 38.1 kDa. The protein migrates as 45-55 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
>95% as determined by SDS-PAGE.
>95% as determined by SEC-HPLC.
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
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Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
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 was observed after storage at:
Human SIRP alpha (HPLC-verified), 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%.
The purity of Human SIRP alpha (HPLC-verified), His Tag (Cat. No. SIA-H5225) was greater than 95% as determined by SEC-HPLC.
FACS assay shows that recombinant Human SIRP alpha, His Tag (HPLC-verified) (Cat. No. SIA-H5225) can bind to Jurkat cell expressing CD47. The concentration of SIRP alpha used is 1 ug/ml (Routinely tested).
FACS analysis shows that the binding of Human SIRP alpha, His Tag (HPLC-verified) (Cat. No. SIA-H5225) to Jurkat expressing CD47 was inhibited by increasing concentration of neutralizing anti-CD47 antibody. The concentration of SIRP alpha used is 1 ug/ml. IC50=0.2257 ug/ml (Routinely tested).
Authors: Yu XY, et al.
Journal: Biochimie 2018
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Price(USD) : $280.00
Price(USD) : $1980.00
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