Zhimin Wan, Jianqiang Ye, Liangliang Xu, Hongxia S. Antigenic Mapping of the Hemagglutinin of an H9N2 Avian Influenza Virus Reveals Novel Critical Amino Acid Positions in Antigenic Sites. J. Virol. April 2014 vol. 88 no. 7 3898-3901
H9N2 influenza virus is undergoing extensive genetic and antigenic evolution, warranting detailed antigenic mapping of its hemagglutinin (HA). Through examining antibody escape mutants of an Asian avian H9N2 virus, we identified 9 critical amino acid positions in H9 antigenic sites. Five of these positions, 164, 167, 168, 196, and 207, have not been reported previously and, thus, represent novel molecular markers for monitoring the antigenic change of H9N2 virus.
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