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Your Position: Home > Viral Proteins > S protein RBD > SPD-C5259
  • Synonym
    Spike,S protein RBD,Spike glycoprotein Receptor-binding domain,S glycoprotein RBD,Spike protein RBD,COVID-19
  • Source
    SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified) (SPD-C5259) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Phe 541 (Accession # QHD43416.1).
    Predicted N-terminus: Arg 319
  • Molecular Characterization
    Online(Arg 319 - Phe 541) QHD43416.1

    This protein carries a mouse IgG2a Fc tag at the C-terminus.

    The protein has a calculated MW of 52.0 kDa. The protein migrates as 60-65 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS,pH7.4 . 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:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified) (Cat. No. SPD-C5259) SDS-PAGE gel

SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified) on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS
SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified) (Cat. No. ) MALS images

The purity of SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag (Cat. No.SPD-C5259) was more than 85% and the molecular weight of this protein is around 105-120 kDa verified by SEC-MALS.

Bioactivity-ELISA
SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified)SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag(MALS verified) (Cat. No. SPD-C5259) ELISA bioactivity

Immobilized Human ACE2, His Tag (Cat. No. AC2-H52H8) at 1 μg/mL (100 μL/well) can bind SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag (Cat. No. SPD-C5259) with a linear range of 0.1-2 ng/mL (QC tested).

Bioactivity-BLI
Human_FcRn_Heterodimer_Protein_Bli

Loaded SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag (Cat. No. SPD-C5259) on AMC Biosensor, can bind Human ACE2, His Tag (Cat. No. AC2-H52H8) with an affinity constant of 3.44 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Bioactivity-FACS
FACS assay shows that recombinant Biotinylated FACS

FACS analysis shows that the binding of SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag (Cat. No. SPD-C5259) to Vero E6 cells surface ACE2 was inhibited by increasing concentration of Anti-SARS-CoV-2 Neutralizing Antibody, Human IgG1 (Cat. No. SAD-S35). The concentration of SARS-CoV-2 S protein RBD used is 5μg/ml. The IC50 is 10.33 μg/ml (Routinely tested).

FACS assay shows that recombinant Biotinylated FACS

FACS analysis shows that SARS-CoV-2 S protein RBD, Mouse IgG2a Fc Tag (Cat. No. SPD-C5259) can bind to Vero E6 cells surface ACE2. The concentration of SARS-CoV-2 S protein RBD is 5 μg/ml.

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Price(USD) : $350.00

Price(USD) : $2310.00

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