depicts the 14 different nsps produced by
processing of the pp1a and pp1ab polyprotein translated from ORF1a and ORF1b. The
proteases that carries out processing are nsp1α, nsp1β, nsp2 and nsp4 (shown in grey and
their protease family is also denoted). The two known proteins that are part of the viral
replicase complex are nsp9 (polymerase) and nsp10 (helicase) are shown in red. PRRSV
nsps for which no function has been described are in white.