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- Biotinylated SARS-CoV-2 S protein (D614G), His, Avitag™, Super stable trimer (MALS verified) | SPN-C82E3
Acro Biosystems
Biotinylated SARS-CoV-2 S protein (D614G), His, Avitag™, Super stable trimer (MALS verified) | SPN-C82E3
- SKU:
- SPN-C82E3
- UPC:
- MPN:
- Host:
- HEK293
- Lineage:
- SARS-CoV-2 (D614G)
- Molecule:
- Spike protein
- Mutation:
- D614G
- Species:
- SARS-CoV-2
- Tag:
- His Tag & Avi Tag
Description
Biotinylated SARS-CoV-2 S protein (D614G), His, Avitag™, Super stable trimer (MALS verified) | SPN-C82E3 | Acro Biosystems | SARS-CoV-2 Protein Mutants
Synonym
Spike, S protein, Spike glycoprotein, S glycoprotein
Source
Biotinylated SARS-CoV-2 S protein (D614G), His,Avitag, Super stable trimer (SPN-C82E3) is the ectodomain of SARS-CoV-2 S protein that contains AA Val 16 - Pro 1213 (Accession # QHD43416.1(D614G)) and D614G mutation, which has become increasingly common in SARS-CoV-2 viruses from around the world . The recombinant protein is expressed from human 293 cells (HEK293) with T4 fibritin trimerization motif and a polyhistidine tag at the C-terminus. Proline substitutions (F817P, A892P, A899P, A942P, K986P, V987P) and alanine substitutions (R683A and R685A) are introduced to stabilize the trimeric prefusion state of SARS-CoV-2 S protein and abolish the furin cleavage site, respectively.
Predicted N-terminus: Val 16
Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 139.7 kDa. The protein migrates as 150-200 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Biotinylation
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
Biotin:Protein Ratio
The biotin to protein ratio is 0.5-1 as determined by the HABA assay.
Endotoxin
Less than 1.0 EU per μg by the LAL method.
Purity
>95% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
Formulation
Lyophilized from 0.22 μm filtered solution in PBS. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
-20°C to -70°C for 12 months in lyophilized state;
-70°C for 3 months under sterile conditions after reconstitution.
after reconstitution.
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