Your Reagent Warehouse for COVID-19 Vaccine Development

The purity of SARS-CoV-2 S protein, His Tag, Super stable trimer (Cat. No. SPN-C52H9) is more than 90% verified by SDS-PAGE under reducing (R) condition. The molecular weight was around 550-660 kDa confirmed by SEC-MALS. The particles are similar in size and appearance to SARS-CoV-2 trimers reported in published literature verified by negative stain electron micrography.

SARS-CoV-2 S protein, His Tag, Super stable trimer (Cat. No. SPN-C52H9) shows highest signal-to-noise ratio as compared to other spike proteins constructs in antibody tests in convalescent serum

Loaded Monoclonal Anti-SARS-CoV-2 Spike RBD Antibody, Mouse IgG1 (Cat. No. SPD-M305) on AMC Biosensor, can bind SARS-CoV-2 Spike RBD, His Tag (B.1.1.529/Omicron) (Cat. No. SPD-C522e) with an affinity constant of 9.07 nM as determined in BLI assay (ForteBio Octet Red96e).

Immobilized  SARS-CoV-2 Spike RBD (Omicron, Cat. No. SPD-C522e) can bind Anti-SARS-CoV-2 Spike RBD Antibody, Mouse IgG1(Cat. No.SPD-M305) with a linear range of 0.4-12.5 ng/mL. The antibody does not bind  Spike RBD of WT (Cat. No. SPD-C52H1), Alpha (Cat. No. SPD-C52Hn), Beta (Cat. No. SPD-C52Hp), Delta(Cat. No. SPD-C52Hh).

Immobilized SARS-CoV-2 S1 protein, His Tag (Cat. No. S1N-C52H3) at 2 μg/mL (100 μL/well) can bind Biotinylated Human ACE2, His,Avitag (Cat. No. AC2-H82E6) with a linear range of 2-20 ng/mL (QC tested).

Human ACE2, Fc Tag (Cat. No. AC2-H5257) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind recombinant SARS-CoV-2 Spike vaccine with an affinity constant of 16.9 nM as determined in a SPR assay (Biacore T200).

Competitive ELISA

Post-vaccination serum NAb test (Cat. No. RAS-N022) demonstrates high sensitivity and accuracy

16 convalescent serum samples were tested for neutralizing antibody level with pseudovirus and ELISA kit (Cat. No. RAS-N022), respectively. The results are highly correlated (R2 =93.73)。

56 post-vaccination (inactivated vaccines) serum samples are tested for neutralizing capacity against multiple strains (Alpha, Beta, Gamma, Delta) of SARS-CoV-2 with wild type (WT) and mutant-specific kits. Neutralization against all VOCs is lower than the WT, with Delta being the lowest.

Note：y = (A - D) / [1 + (x/C)^B] + D (A =1.55562 B =1.45522 C=14.42024 D=0.05532 r^2= 1)

Anti-SARS-CoV-2 Spike RBD Neutralizing antibody (Cat. No.S1N-M122)neutralizes SARS-CoV-2 Spike RBD by inhibiting RBD: ACE2 interaction. The ACE2-coated plate is incubated with the wild type (WT) RBD or B.1.1.7, B.1.351, P.1, B.1.617.1, B.1.617.2 mutant and treated with the neutralizing antibody at increasing concentration. Percent inhibition is calculated based on the OD value.

As verified by SARS-CoV-2 spike pseudovirus neutralization test, the broad-spectrum neutralizing antibody (Cat. No. S1N-M122) can effectively neutralize wild-type and Alpha (B.1.1.7) /Beta (B.1.351) /Gamma (P.1) /Delta (B.1.617.2, data not shown) viral mutants, making it suitable as a quality control antibody in neutralizing antibody screening for mutant strains, neutralizing antibody detection in convalescent or vaccinated serum, etc.