Table 1. Molecular characterization of hemagglutinin (HA) from virus isolates in this study (H9 numbering).
A, alanine; V, valine; T, threonine; QQG, glutamine-glutamine-glycine; LMG, leucine-methionine-glycine; NGT, asparagine-glycine-threonine; NNT, asparagine-asparagine-threonine; NRT, asparagine-arginine-threonine; NCS, asparagine-cysteine-serine; PARSSRGLF, proline-alanine-arginine-serine-serine-arginine-glycine-leucine-phenylalanine; PSRSSRGLF, proline-serine-arginine-serine-serine-arginine-glycine-leucine-phenylalanine; PSKSSRGLF, proline-serine-phenylalanine-serine-serine-arginine-glycine-leucine-phenylalanine.