Recombinant Protein;1MG;SARS-CoV-2 S1 protein NTD, His Tag (S1D-C52Hc) is expressed from human 293 cells (HEK293). It contains AA Ser 13 - Leu 303 (Accession # QHD43416.1). The L18F/D80A/D215G/LAL242-244del/R246I mutations were identified on the spike protein N-terminal domain (NTD) in the SARS-CoV-2 variant (known as B.1.351 or 20C/501Y.V2) which emerged in South Africa.;This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 34.5 kDa. The protein migrates as 50-65 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.;Immobilized SARS-CoV-2 S1 protein NTD, His Tag (Cat. No. S1D-C52Hc) at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 Spike NTD Antibody, Chimeric mAb (Cat. No. SPD-M121) with a linear range of 0.1-2 ng/mL (QC tested).;Immobilized Anti-SARS-CoV-2 Spike NTD Antibody, Chimeric mAb (Cat. No. SPD-M121) at 1 μg/mL (100 μL/well) can bind SARS-CoV-2 S1 protein NTD, His Tag (Cat. No. S1D-C52Hc) with a linear range of 8-63 ng/mL