Replicase polyprotein 1ab (pp1ab) (ORF1ab polyprotein) [Cleaved into: Host translation inhibitor nsp1 (Leader protein) (Non-structural protein 1) (nsp1); Non-structural protein 2 (nsp2) (p65 homolog); Papain-like protease nsp3 (PL-PRO) (EC 3.2.2.-) (EC 3.4.19.12) (EC 3.4.22.-) (Non-structural protein 3) (nsp3) (PL2-PRO); Non-structural protein 4 (nsp4); 3C-like proteinase nsp5 (3CL-PRO) (3CLp) (EC 3.4.22.69) (Main protease) (Mpro) (Non-structural protein 5) (nsp5) (SARS coronavirus main proteinase); Non-structural protein 6 (nsp6); Non-structural protein 7 (nsp7); Non-structural protein 8 (nsp8); Viral protein genome-linked nsp9 (Non-structural protein 9) (nsp9) (RNA-capping enzyme subunit nsp9); Non-structural protein 10 (nsp10) (Growth factor-like peptide) (GFL); RNA-directed RNA polymerase nsp12 (Pol) (RdRp) (EC 2.7.7.48) (EC 2.7.7.50) (Non-structural protein 12) (nsp12); Helicase nsp13 (Hel) (EC 3.6.4.12) (EC 3.6.4.13) (Non-structural protein 13) (nsp13); Guanine-N7 methyltransferase nsp14 (EC 2.1.1.-) (EC 2.1.1.56) (EC 3.1.13.-) (Non-structural protein 14) (nsp14) (Proofreading exoribonuclease nsp14) (ExoN); Uridylate-specific endoribonuclease nsp15 (EC 4.6.1.-) (NendoU) (Non-structural protein 15) (nsp15); 2'-O-methyltransferase nsp16 (EC 2.1.1.57) (Non-structural protein 16) (nsp16)]