MX1 and infection: To understand the kinetics of LGP2 induction, we conducted qRT-PCR to determine the expression of LGP2 and SeV phosphoprotein gene, in comparison with that of RIG-I, MX1 and IFIT3, in HeLa-WT and HeLa-IFNAR1-KO cells, mock-infected and infected by SeV at 6 and 12 h post-infection (h.p.i.), respectively.