Polyprotein P1234 (P1234) (Non-structural polyprotein) [Cleaved into: Polyprotein P123' (P123'); Polyprotein P123 (P123); mRNA-capping enzyme nsP1 (EC 2.1.1.-) (EC 2.7.7.-) (Non-structural protein 1); Protease nsP2 (EC 3.4.22.-) (EC 3.6.1.15) (EC 3.6.1.74) (EC 3.6.4.13) (Non-structural protein 2) (nsP2); Non-structural protein 3' (nsP3') (EC 3.2.2.-); Non-structural protein 3 (nsP3) (EC 3.2.2.-); RNA-directed RNA polymerase nsP4 (EC 2.7.7.19) (EC 2.7.7.48) (Non-structural protein 4) (nsP4)]