分子别名(Synonym)
Spike,S protein RBD,Spike glycoprotein Receptor-binding domain,S glycoprotein RBD,Spike protein RBD
表达区间及表达系统(Source)
SARS-CoV-2 S protein RBD, His Tag (SPD-C52H2) is expressed from human 293 cells (HEK293).
蛋白结构(Molecular Characterization)
This protein carries a polyhistidine tag at the C-terminus
The protein has a calculated MW of 24.7 kDa. The protein migrates as 30-35 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素(Endotoxin)
Less than 1.0 EU per μg by the LAL method.
纯度(Purity)
>90% as determined by SDS-PAGE.
制剂(Formulation)
Supplied as 0.2 μm filtered solution in PB, pH7.4 .
Contact us for customized product form or formulation.
运输(Shipping)
This product is supplied and shipped with dry ice, please inquire the shipping cost.
存储(Storage)
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- The product MUST be stored at -70°C or lower upon receipt;
- -70°C for 3 months under sterile conditions.
电泳(SDS-PAGE)
SARS-CoV-2 S protein RBD, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90%.
活性(Bioactivity)-ELISA
Immobilized SARS-CoV-2 S protein RBD, His Tag (Cat. No. SPD-C52H2) at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 RBD Neutralizing Antibody, Human IgG1 (Cat. No. SAD-S35) with a linear range of 0.2-3 ng/mL (QC tested).
Protocol
背景(Background)
It's been reported that Coronavirus can infect the human respiratory epithelial cells through interaction with the human ACE2 receptor. The spike protein is a large type I transmembrane protein containing two subunits, S1 and S2. S1 mainly contains a receptor binding domain (RBD), which is responsible for recognizing the cell surface receptor. S2 contains basic elements needed for the membrane fusion.The S protein plays key parts in the induction of neutralizing-antibody and T-cell responses, as well as protective immunity.