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. 2014 Mar 31;111(15):5676–5681. doi: 10.1073/pnas.1403684111

Table 1.

Amino acid conservation among vaccine-expressed H5N1 antigens and heterologous influenza viruses used in challenge studies

HA NA NP M1 M2
H1N1 62 87 94 96 92
H7N7 38 40 99 96 94
H7N9 38 41 99 93 88
H3N2 38 37 92 95 87

Protein sequences were aligned using CLUSTALW to identify amino acid homology. Conservation among the entire polypeptides is shown.