After transfecting a plasmid encoding Myc-SREBP2 into control and shVDR-2 PK-15 cells followed by PRV-QXX infection, the analysis through immunoblotting analysis showed that the nuclear form of Myc-SREBP2 was present in PRV-infected control cells but absent in PRV-infected shVDR-2 PK-15 cells (Fig. 6B). This evidence concerns the gene SREBF2 and infection.