293-TLR3 cells were co-transfected with plasmids encoding luciferase under control of the IL-8 promoter, a DN form of RIG-I or the empty vector (control), and pSV-beta-galactosidase for normalization. Sixteen hrs pt, cells were infected with the indicated viruses at an moi of 10. Six hours later, cells were left untreated or treated with dsRNA (PolyI:C; 5 ug/ml). Lysates were harvested at 24 h pi and analyzed for luciferase activity. Results are expressed as fold over that seen with mock infected cells not treated with dsRNA. Data are from triplicate samples and error bars represent standard deviation. *; p<0.05 comparing SV5-GFP infected control cells with infected cells expressing DN RIG-I; #, p<0.02 comparing P/V mutant infected control cells with infected cells expressing DN RIG-I. P/V Mut, P/V-CPI-; Le Mut, Le-(U5C, A14G).