Avian flu H9N2 nucleoprotein aa58-77. The amino acid sequence used as immunogen is 95% homologous to chicken and quail H5N1 and 90% homologous to swine H5N1.
An H6N1 influenza virus was isolated from a green-winged teal during the H5N1 outbreak in Hong Kong Special Administrative Region (SAR) in 1997. This virus possesses similar genes encoding internal proteins as in the human H5N1 and H9N2 influenza viruses