SARS-CoV-2 Spike RBD (S477N, E484K), His Tag (SPD-C52Hq) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Lys 53 7 (Accession # QHD43416.1 (S477N, E484K)). The mutations (S477N, E484K) were identified in the SARS-CoV-2 variants wh 1 * 100 µG