BMC Infectious Diseases

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
Virus	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

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

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