Biotinylated SARS-CoV-2 Spike S1, His,Avitag (S1N-C82E4) is expressed from human 293 cells (HEK293). It contains AA Val 16 - Arg 685 (Accession # QHD43416.1). The mutations (T95I, G142D, E154K, L452R, E484Q, D614G, P681R, Q1071H) were identified in v 1 * 25 µG