Table 4.
Models used to test if presently expressed genes exhibit higher ω ( d N / d S ) values than the rest of the genes and results of the tests
| Model | ω | Ln( L ) | P-value |
|---|---|---|---|
| Null: One rate |
ω = 1.645 |
-1091.238 |
- |
| Alternative: Two rates |
ω1 = 1.418, ω2 = 7.813 |
-1089.095 |
0.038 |
| Alternative: Two rates reversed |
ω1 = 1.642, ω2 = 1.653 |
-1091.238 |
1.000 |
| Alternative: Three rates | ω1 = 1.332, ω2 = 1.651, ω3 = 7.824 | -1088.990 | 0.106 |
Ln(L): log-likelihood of each model. P-values were estimated with the Likelihood Ratio Tests of null and alternative models. Definitions of ω variables in each model are described in the methods section.