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Variations in the potential glycosylation sites were observed in hemagglutinin (HA) sequences of H9N2 avian influenza virus isolated in China, deposited in the Influenza Virus Resource of NCBI before 2017, which showed a deleted glycosylation site at amino acid residue 218, and an introduced glycosylation site at amino acid residue 313. Based on the variations in the glycosylation sites at these amino...
Airborne transmission plays an important role in dissemination of H9N2 subtype avian influenza virus. Annexin II (A2)-mediated activation of plasminogen (PLG) promotes cleavage of the influenza virus HA protein and viral replication, resulting in enhanced pathogenesis. In this study, airborne transmission competent and defective strains of H9N2 influenza virus, SH7 and SH14, respectively, were used...
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