The Recombinant SARS-CoV Nucleocapsid Protein is manufactured with N-terminal fusion His Tag. The Recombinant SARS-CoV Nucleocapsid His-Tagged Fusion Protein is 47.8kDa containing 437 amino acid residues of the SARS-CoV Nucleocapsid protein and 16 additional amino acid residues – His Tag (underlined).