SARS-CoV-2 Spike S1 Protein (T19R & V70F & E156G & 157-158 deletion & A222V & K417N & L452R & T478K & D614G & P681R, His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 76.28 kDa and the accession number is A0A6G7K
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