SDS-PAGE of Recombinant SARS-CoV-2 Spike Glycoprotein Protein (A270591). The lanes contain samples of: [1] Protein standards, [2-3] Recombinant SARS-CoV-2 Spike Glycoprotein Protein (A270591), [4] 5.6 µg of BSA, [5] 2.83 µg of BSA, and [6] 1.4 µg of BSA. The band on the SDS-PAGE with an apparent molecular weight of 32 kDa corresponds to the Recombinant SARS-CoV-2 Spike Glycoprotein Protein (A270591).