Recombinant SARS-COV-2 Spike RBD(N501Y) Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Arg319-Phe541(N501Y)) of SARS-COV-2 RBD (Accession YP_009724390.1) fused with a 6*His tag at the C-terminus.