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Analysis of genetic determinants of host range and virulence in HA proteins of Bangladeshi (BD) H9N2 viruses. *Numbers in parentheses indicate number of viruses containing specific amino acid residues/glycosylation sites. *Blue bold indicates an additional glycosylation site only present in A/environment/Bangladesh/1041/2009 H9N2 isolate. *Abbreviations: A, see figure 3.
