SARS-CoV-2 Spike RBD (L452R, T478K), Fc Tag (SPD-C525e) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Lys 537 (Accession  QHD43416.1 (L452R, T478K)). The L452R, E484Q mutations were identified in the SARS-CoV-2 variants which a 1 * 100 µG