TABLE 1.

Inhibition of virus-mediated induction of IFN (U/ml) by vIRF-3 in mouse L929 cells

Plasmidsa	IFN (U/ml)b
	1st expt	2nd expt
Vector-NDVc	15,000	21,200
vIRF-3-NDV	8,250	11,520

^aMouse L929 cells were transfected with either vIRF-3-expressing plasmid or empty vector, and 24 h after transfection, cells were infected with NDV (multiplicity of infection = 5). 

^bThe levels of IFN were determined by biological assay (35) in the medium collected 16 h after infection. 

^cNDV, Newcastle disease virus.