Table 1.
Positive and negative selected sites for the influenza A/H1N1pdm09 and influenza B strains identified in this study.
| Methods | Influenza A/H1N1pdm09 Virus Codon | Influenza B Virus Codon | ||
|---|---|---|---|---|
| Positive | Negative | Positive | Negative | |
| SLAC | None | 431, 472, 544 | None | 19 sites |
| FEL | 120, 137, 205, 250 | 472, 544 | 122, 181 | None |
| FUBAR | 137, 222 | 39 sites | 229, 251 | 114 sites |
| MEME | 222 | None | 253 | None |
SLAC: single-likelihood ancestor; FEL: fixed-effects likelihood; FUBAR: fast unconstrained Bayesian approximation; MEME: mixed effects model evolution.