Table 1 Codon based tests of positive selection assuming site variation of ω
Null model | Positive selection model | |
|---|---|---|
Model name [35, 36] | M8A | M8 |
Transition/transversion ratio | 2.17 | 2.37 |
Parameter p in Beta | 3.16 | 0.96 |
Parameter q in Beta | 20.25 | 3.30 |
Frequency of additional class | 0.19 (i.e. 76 sites) | 0.10 (i.e. 38 sites) |
ω of additional class (ωs) | 1 (fixed) | 2.24 |
Number of free parameters | 4 | 5 |
Log-likelihood | -7119.01 | -7091.80 |
Likelihood ratio | 54.44 | |
P-value | P < 10-12 |