Figure 1

Western blot analysis of HA ₁ protein from recombinant virus. Lysates of CEF infected with H5N1 viruses at an MOI of 1 for 12 h were incubated with mAb SYA9 (anti-HA1 of H5N1) and mouse serum (anti-M1 of H5N1). The bands were visualized by a chemiluminescence imaging analysis system after incubation with peroxidase-conjugated secondary antibodies.