Properties of the recombinant viruses used in this study.

a) CPE of the recombinants shown in Fig. 4A (−, little or no; +, slight; ++, severe; +++, quite severe).b) Inhibitory effect of the recombinants against IFN-α-induced antiviral state examined in Fig. 5.c) Inducibility of antiviral state by infection of the recombinants examined in Fig. 5 (−, no; +, moderate; ++, high).d) Levels of IFN-β induced by infection of the recombinants examined in Fig. 6 (−, 1–50-fold; +, 50–150-fold; ++, >150-fold higher than that of uninfected sample, (−)).e) dsRNA synthesis in the cells infected with the recombinants examined in Fig. 7 (−, no; +, slight; ++, weak; +++, strong).f) n.d., not done.g) Inhibitory effect of the recombinants against poly(I:C)-mediated translocation of IRF-3 into the nucleus examined in Fig. 8.