Active Recombinant COVID-19 Spike protein RBD (K417T, E484K, N501Y), Fc-tagged

• Cat.No.: Spike-4714V
• Product Overview: Recombinant COVID-19 protein RBD (K417T, E484K, N501Y)(Arg 319 - Lys 537), fused with Fc tag, was expressed in HEK293.

Specification

• Source: HEK293
• Species: COVID-19
• Tag: Fc
• Form: Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 25 mM Arginine, 150 mM NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.
• Bio-activity: Immobilized SARS-CoV-2 S protein RBD (K417T, E484K, N501Y), Fc Tag at 2 μg/mL (100 μL/well) can bind Human ACE2, His Tag with a linear range of 39-156 ng/mL.Immobilized Human ACE2, His Tag at 2 μg/mL (100 μL/well) can bind SARS-CoV-2 S protein RBD (K417T, E484K, N501Y), Fc Tag with a linear range of 0.1-0.8 ng/mL.
• Molecular Mass: This protein carries a human IgG1 Fc tag at the C-terminus.The protein has a calculated MW of 51.1 kDa. The protein migrates as 55-60 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
• Protein Length: Arg 319 - Lys 537
• 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.
• Storage: For long term, the product should be stored at lyophilized state at -20°C or lower.Please avoid repeated freeze-thaw cycles. This product is stable after at:
  -20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution.
• 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; COVID-19 Omicron
• Gene ID: 43740568
• Protein Refseq: YP_009724390.1
• UniProt ID: P0DTC2