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Table 2 Glycosylation sites in the hemagglutinin (HA) of H3N2 strains isolated from the clinical specimens included in the database

From: Re-emergence of H3N2 strains carrying potential neutralizing mutations at the N-linked glycosylation site at the hemagglutinin head, post the 2009 H1N1 pandemic

Virus Glycosylation sites in HA
45 63 122 126 133 144 165 246
2010–11 season (11 samples)
 8 samples (72.7 %) SSS NCT NES NWT NGT KNS NVT NST
 3 samples (27.3 %) SSS NCT NES NWT NGT NNS NVT NST
2011–12 season (47 samples)
 32 samples (68.0 %) SSS NCT NES NWT NGT NSS NVT NST
 4 samples (8.5 %) NSS NCT NES NWS NGT NSS NVT NST
 2 samples (4.3 %) NSS NCT NES NWT NGT NSS NVT NST
 1 sample (2.1 %) NSS NCT NES NWT NGT NNS NVT NST
 1 sample (2.1 %) SSS NCT NES NWT NGT NNS NVT NST
 1 sample (2.1 %) SSS NCT NES NWT NGT NSS NVT TST
 1 sample (2.1 %) SSS NCT NES NWT NGT DSS NVT NST
 1 sample (2.1 %) NSS NCT NES NWT NGT NSS NVT NST
 1 sample (2.1 %) SSS NCT NES NWT NGT NNS NVT NST
 1 sample (2.1 %) SST NCT NES NWT NGT NSS NVT NST
 1 sample (2.1 %) NSS NCT NES NWS NGT NNS NVT NST
 1 sample (2.1 %) NSS NCT NES NWS NGT NNS NVT NST
 1 sample (2.1 %) SSS NCT NES NWS NGT NNS NVT NST
  1. Residue 45 is located in the stem of HA, and residues 63, 122, 126, 133, 144, 165, and 246 are located in the globular head of HA