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Synonyms:

| Pack Size | Price | USA Stock | Global Stock | Quantity |
|---|---|---|---|---|
| 5 μg | $250 | 7-10 days | 7-10 days | |
| 10 μg | $419 | 7-10 days | 7-10 days | |
| 20 μg | $812 | 7-10 days | 7-10 days |
| Bioactivity | Activity testing is in progress. It is theoretically active, but we cannot guarantee it. If you require protein activity, we recommend choosing the eukaryotic expression version first. |
| Description | SARS-CoV-2 Spike S1+S2 Protein (T95I & G142D & E154K & L452R & E484Q & D614G & P681R & Q1071H, His & Avi), Biotinylated is expressed in Baculovirus insect cells with His and Avi tag. The predicted molecular weight is 136.32 kDa and the accession number is A0A6G7K2L4. |
| Species | SARS-CoV-2 |
| Expression System | Baculovirus Insect Cells |
| Tag | C-His-Avi |
| Accession Number | A0A6G7K2L4 |
| Construction | A DNA sequence encoding the SARS-CoV-2 Spike S1+S2 (YP_009724390.1, with mutations T19R, L452R, E484Q, D614G, P681R, D950N, G142D) (Met1-Pro1213) was expressed with a C-terminal polyhistidine tag followed by an AVI tag. The expressed protein was biotinylated in vivo by the Biotin-Protein ligase (BirA enzyme) which is co-expressed. The mutations were identified in the SARS-CoV-2 variant (known as B.1.617.1) which emerged in the India. Predicted N terminal: Val 16 |
| Protein Purity | > 85 % as determined by SDS-PAGE. |
| Endotoxin | < 1.0 EU/μg of the protein as determined by the LAL method. |
| Formulation | Lyophilized from a solution filtered through a 0.22 μm filter, containing 20 mM Tris, 300 mM NaCl, 10% glycerol, pH 8.0.Typically, a mixture containing 5% to 8% trehalose, mannitol, and 0.01% Tween 80 is incorporated as a protective agent before lyophilization. |
| Reconstitution | A Certificate of Analysis (CoA) containing reconstitution instructions is included with the products. Please refer to the CoA for detailed information. |
| Stability & Storage | It is recommended to store recombinant proteins at -20°C to -80°C for future use. Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots. |
| Shipping | In general, lyophilized powders are shipped with blue ice, while solutions are shipped with dry ice. |
| Research Background |
| Molecular Weight | 136.32 kDa (predicted) |
| Storage | Lyophilized powder: -20~-80°C for 1 year | Solution: -80°C for 6 months |
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