Recombinant SARS-CoV-2 Spike RBD(Lambda/C.37) Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Arg319-Phe541(F490S,L452Q)) of sars-cov-2 Spike RBD(Lambda/C.37) (Accession YP_009724390.1) fused with a