Biotinylated SARS-CoV-2 Spike Trimer, His,Avitag (SPN-C82Ek) is the ectodomain of SARS-CoV-2 spike protein which contains AA Val 16 - Pro 1213 (Accession # QHD43416.1). The mutations T95I, Y144S, Y145N, R346K, E484K, N501Y, D614G, P681H, D950N were i 1 * 25 µG