Recombinant SARS-CoV-2 Spike S1(D614G) Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Val16-Arg685(Asp614Gly)) of sars-cov-2 Spike S1(D614G) (Accession QHD43416.1) fused with a 6*His tag at the C-te