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. Author manuscript; available in PMC: 2018 Sep 15.
Published in final edited form as: J Infect Dis. 2017 Sep 15;216(Suppl 4):S539–S547. doi: 10.1093/infdis/jix093

Table 4.

Antigenic Site A Variation Among Human sH3N2 Viruses and 2012–2013 H3N2v Viruses

Amino Acid Residues in Antigenic Site Aa
Glycosylation
Sites, No.b
Accession
No.c
Strain 122 124 126 131 133 135 137 138 140 142 143 144 145 146
sH3N2 viruses
   SH/87 N D Nd T S G Y A K G S V N S 1 AF008886
   BJ/92 A D 1 CY113677
   WH/95 G A D T K 1 EU501120
   SY/97 Nd S A Nd T S I K 3 CY112885
   BR/07 Nd S Nd T S I R Nd 4 EU199366

H3N2v viruses
   OH/13/12 Q S A D Y R 1 EPI381857
   IN/6/13 Q S A D Y R K 1 EPI461874
   IN/17/13 Q S A D Y R R 1 EPI462212

Abbreviations: H3N2v, influenza A(H3N2) variant; IN/6/13, A/Indiana/06/2013; IN/17/13, A/Indiana/17/2013; OH/13/12, A/Ohio/13/2012; sH3N2, human seasonal influenza A(H3N2).

a

The aa sequence in antigenic site A; ellipses denote sequence identical to that for SH/87 virus.

b

Numbers of potential glycosylation sites in antigenic site A.

c

Hemagglutinin sequences were accessed from the National Center for Biotechnology Information or the GISAID database.

d

Potential glycosylation sites (N-X-S/T).