2019 nCoV/COVID19 Spike protein S1 Recombinant-His AVI

///2019 nCoV/COVID19 Spike protein S1 Recombinant-His AVI

2019 nCoV/COVID19 Spike protein S1 Recombinant-His AVI


accession NCOVS1

Source DNA sequence encoding extracellular fragment[16-675] of NCOV Spike S1 [accession# QIC53204.1] including a C terminal polyHis Avi tag was expressed in HEK cells.
Molecular weight Recombinant NCOV S1 encodes the NCOV spike glycoprotein S1 sequence . This molecule has a calculated mass of approximately 76kDa. Recombinant S1 migrates due to glycosylation as an approximately 120 kDa protein under reducing conditions in SDS-PAGE.
Activity The activity was tested by binding Human ACE2-Fc in functional ELISA assay, the calculated EC50 was determined to be 0.1ug/ml.
Purity >95%, as determined by SDS-PAGE and HPLC
Endotoxin Endotoxin content was assayed using a LAL gel clot method. Endotoxin level was found to be less than 0.1 ng/µg(1EU/µg).
Presentation Recombinant COVID-19 Spike S1 was lyophilized from 0.2 µm filtered PBS solution pH7.4
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Storage The lyophilized protein is stable for at least 2 years from date of receipt at -20° C.
Usage This product is for research purposes only.It may not be used for therapeutics or diagnostic purposes.



  • The recombinant S1-His protein migrates as 120kDa due to glycosylation

2019ncov S1-Human ACE functional binding ELISA assay

  • 2019-ncov S1-his tagged (coating at 0.5ug-well) binding with Human ACE2-Fc (cat#RKQ9BYF1F) .The linear range was found to be 0.1-5 ug/ml