Synonym
S1 protein; Spike protein S1; Spike,S1 protein; S glycoprotein Subunit1
Source / expression
Recombinant SARS-CoV-2 Spike S1 (Lambda C.37) Protein is expressed from HEK293 with His tag at the C-Terminus.It contains Gln14-Arg683(G75V, T76I, R246N, 247-253 del, L452Q, F490S, D614G) [Accession | QHD43416.1].
Molecular weight
The protein has a predicted MW of 75.28 kDa. Due to glycosylation, the protein migrates to 100-120 kDa based on Bis-Tris PAGE result.
Endotoxin
Less than 1 EU per μg by the LAL method.
Purity
> 95% as determined by Bis-Tris 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
Dissolve the lyophilized protein in distilled water. Please refer to the Certificate of Analysis for detailed instructions.
Storage
-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.
