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. 2009 Nov 17;4(11):e7789. doi: 10.1371/journal.pone.0007789

Table 3. Codons under positive selection in HA1 of human A(H1N1) influenza viruses.

Positively selected sites1
I- v 2006∼2008 (100 strains) M2a 156 (97.5%), 190 (100%)
M8 156 (99.7%), 190 (100%)
1

Positively selected sites from PAML 4.0 [45] using Bayes Empirical Bayes analysis [72]. Only codons with greater than 95% posterior probabilities to be under positive selection were listed with the corresponding posterior probabilities shown in parentheses.