Recombinant Protein;500UG;SARS-CoV-2 S protein (R683A, R685A), His Tag, Super stable trimer (MALS & NS-EM verified) (SPN-C52H9) is expressed from human 293 cells (HEK293). It contains AA Val 16 - Pro 1213 (Accession # QHD43416.1 (R683A, R685A)) trimer Design.;This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 138.0 kDa. The protein migrates as 150-200 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.;Immobilized Human ACE2, Fc Tag (Cat. No. AC2-H5257) at 1 μg/mL (100 μL/well) can bind SARS-CoV-2 S protein (R683A, R685A), His Tag, Super stable trimer (Cat. No. SPN-C52H9) with a linear range of 1-39 ng/mL (QC tested).;Immobilized Anti-SARS-CoV-2 Neutralizing Antibody, Human IgG1 (Cat. No. SAD-S35) at 1 μg/mL (100 μL/well) can bind SARS-CoV-2 S protein (R683A, R685A), His Tag, Super stable trimer (Cat. No. SPN-C52H9) with a linear range of 0.3-10 ng/mL (Routinely tested).