SARS-CoV Orfs used for construction of the viral orfeome

Products of ORFs 1a and 1ab with predicted processing positions are listed as non-structural proteins nsp1 through nsp16. Nucleotide positions used to clone the individual SARS-CoV ORFs and the expected amino acid length are also given. Pol: RNA polymerase; Hel: C/H,NTPase,dNTPase, 5′-to3′RNA helicase and DNA helicase, RNA 5′triphosphatase; ExoN: 3′-to-5′ exoribo-nuclease, C/H; XendoU: Uridylate-specific enodribonuclease; 2′-O-MT: 2′-O-ribose methyltransferase. Nomenclature by Snijder et al. 2003 and Thiel et al. 2003.