IRF7 and viral infectious disease: Using DNA isolated from HTNV infected cell lysates as template, a 177-bp DNA fragment containing NF-κB site and a 200-bp DNA fragment containing ISRE site were amplified in the presence of anti-p50, anti-p65, or anti-IRF7 antibodies, but they were not seen in the mock virus infection group or in the presence of control antibody (Figure 5(e)).