Recombinant SARS-COV-2 Spike RBD(E484K) Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Arg319-Phe541(E484K)) of SARS-COV-2 RBD (Accession YP_009724390.1) fused with an 6*His tag at the C-terminus.