Recombinant COVID-19 BA. 2.75 (Omicron) Spike RBD protein(Arg319-Phe541), His&Avi-tagged, Biotinylated

• Cat.No.: Spike-1239V
• Product Overview: Recombinant SARS-CoV-2 (BA. 2.75) Spike RBD (YP_009724390.1, with mutation G339H, S371F, S373P, S375F, T376A, D405N, R408S, K417N, N440K, G446S, N460K, S477N, T478K, E484A, Q498R, N501Y, Y505H) (Arg319-Phe541) was expressed in HEK293 with a C-terminal polyhistidine tag followed by an AVI tag. The mutations were identified in the SARS-CoV-2 variant (known as variant BA. 2.75). The expressed protein was biotinylated in vivo by the Biotin-Protein ligase (BirA enzyme) which is co-expressed.

Specification

• Source: HEK293
• Species: COVID-19
• Tag: C-His&Avi
• Protein length: Arg319-Phe541
• Conjugation/Label: Biotin
• Form: Lyophilized from sterile PBS, pH 7.4. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization.
• Bio-activity: Immobilized human ACE2 protein (Fc tag) at 2 μg/mL (100 μL/well) can bind Recombinant SARS-CoV-2 (BA. 2.75)Spike RBD Protein (His&AVI Tag), Biotinylated, the EC50 is 1.8-6 ng/mL.
• Molecular Mass: The recombinant SARS-CoV-2 Spike RBD consists of 249 amino acids and predicts a molecular mass of 28.56 kDa. As a result of glycosylation, it migrates as an approximately 34.72 kDa band in SDS-PAGE under reducing conditions.
• Endotoxin: < 1.0 EU per μg protein as determined by the LAL method.
• Purity: > 90 % as determined by SDS-PAGE. > 90 % as determined by SEC-HPLC.
• Storage: Samples are stable for up to twelve months from date of receipt at -20°C to -80°C. Store it under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
• Reconstitution: It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4°C before opening to recover the entire contents.

Gene Information

• Gene Name: S surface glycoprotein [ Severe acute respiratory syndrome coronavirus 2 ]
• Official Symbol: Spike
• Synonyms: Spike; S1 protein; Spike glycoprotein Subunit1; S glycoprotein Subunit1; Spike protein S1
• Gene ID: 43740568
• Protein Refseq: YP_009724390.1
• UniProt ID: P0DTC2