SARS-CoV-2 Recombinant Nucleocapsid Protein, aa1-419 is expressed in E. coli and is one of four structural proteins encoded by the SARS-CoV-2 genome. The Nucleocapsid Protein is transcribed from the viral “N” gene and is the protein that interacts with RNA to form the nucleocapsid. The protein is a homo-oligomer, and both the monomer and the oligomer can interact with RNA. This protein also interacts with the membrane protein (protein M) after infection of the host cell during packaging of the positive-strand viral genome RNA into the ribonucleocapsid during virion assembly. At the amino terminus, SARS-CoV-2 Recombinant Nucleocapsid Protein contains a thrombin site, a T7 tag, and a polyhistidine tag.