SARS-ACN/3 (residues 1-49, 192-220) protein.SARS-ACN contains Nucleocapsid protein immunodominant regions, amino acids: 1-49, 192-220.SARS-ACN is purified by proprietary chromatographictechniques.SARS (Severe Acute Respiratory Syndrome) Coronavirusis an enveloped virus containing three outer structuralproteins, namely the membrane (M), envelope (E), andspike (S) proteins.Spike (S)-glycoprotein of the virus interacts with a cellularreceptor and mediates membrane fusion to allow viralentry into susceptible target cells. Accordingly, S-proteinplays an important role in virus infection cycle and is theprimary target of neutralizing antibodies, 100 ug