Figure 5(A) RIG-I, WT LGP2, and KR mutants of LGP2 were transfected into HEK293 cells together with p125luc reporter plasmids. Luciferase activities were determined 24 h after transfection. The data represent the mean ± SD (n = 3, t-test, *p < 0.05). WCEs were subjected to SDS-PAGE, and the proteins were detected by western blotting (lower panels). Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.(B) HE293 cells stably expressing GFP (control), LGP2, or LGP2-4KR were transfected with p125luc reporter plasmids and then stimulated with indicated amounts of short poly I:C. WCEs were prepared 24 h after transfection and stimulation, and luciferase activity was determined. The proteins were subjected to SDS-PAGE and detected by western blotting with the indicated Abs. The data represent the mean ± SD (n = 3, two-way ANOVA, *p < 0.05). Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.HEK293 cells stably expressing GFP, LGP2, or LGP2-4KR were transfected with 200 ng/ml of short poly I:C (C-E), Total RNA was isolated at the indicated time points. The expression of IFN-β, IP-10, and Ccl5 mRNA was determined by RT-qPCR and normalized to GAPDH. The data represent the mean ± SD (n = 3, two-way ANOVA, *p < 0.05). Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.HEK293 cells stably expressing LGP2, or LGP2-4KR were infected with SeV at MOI = 5 (F-H), Total RNA was isolated at the indicated time points. The expression of IFN-β, IP-10, and Ccl5 mRNA was determined by RT-qPCR and normalized to GAPDH. The data represent the mean ± SD (n = 3, two-way ANOVA, *p < 0.05). Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.HEK293 cells stably expressing LGP2, or LGP2-4KR were infected with influenza A virus (Flu) at MOI =10 (I, J). Total RNA was isolated at the indicated time points. The expression of IFN-β, IP-10 mRNA was determined by RT-qPCR and normalized to GAPDH. The data represent the mean ± SD (n = 3, two-way ANOVA, *p < 0.05 Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.(K, L) HEK293 cell clones stably expressing LGP2 or LGP2-4KR at lower levels were transfected with short poly I:C, and the expression of mRNAs were determined by RT-qPCR. The data represent the mean ± SD (n = 3, two-way ANOVA, *p < 0.05). Data information: All data are representative at least two independent experiments, and "n" represents the number of samples (biological replicates). Error bars represent standard deviation from the mean.