Western blot analysis of Hemaggutinin using recombinant seasonal Hemagglutinin (Lanes A & B) and swine-origin Hemagglutinin (Lanes C & D) with Seasonal H1N1 Hemagglutinin polyclonal antibody (Cat # PAB16767) at 2 ug/mL (Lanes A & C) and Swine H1N1 Hemagglutinin polyclonal antibody (Cat # PAB16769) at 2 ug/mL (Lanes B & D).