SARS-CoV-2 nucleocapsid protein, also known as nucleocapsid and SARS-CoV-2 N protein, Genbank Accession No.: YP_009724397.2, a.a. 1-419(end), with C-terminal Avi-His-tag, expressed in a HEK293 cell expression system. MW= 48 kDa. This protein runs at a higher M.W. by SDS-PAGE due to glycosylation. This protein is enzymatically biotinylated using Avi-Tag™ technology. Biotinylation is confirmed to be ≥90%