SARS-CoV-2 S protein RBD (N501Y), Fc Tag (SPD-C5253) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Lys 537 ( Accession # QHD43416.1 (N501Y)). The N501Y mutaion was identified in multiple SARS-CoV-2 Variants of Concerns (VOCs), 1 * 100 µG