Table 2.
Maximum likelihood estimates of parameters and sites inferred to be under positive selection in the amino-terminal abaecin unit.
| Model | l | LRT | Parameters | Positive selected sites |
|---|---|---|---|---|
| M0 | -312.78 | ω = 0.15 | ||
| M1a | -306.30 | p0 = 0.80, ω0 = 0.046 p1 = 0.20, ω1 = 1.00 |
||
| M2a | -304.95 | 2.7 | p0 = 0.80, ω0 = 0.05 p1 = 0.00, ω1 = 0.05315 p2 = 0.20, ω2 = 5.91067 |
4Y, 6P*, 8R, 11Q, 12K |
| M7 | -306.58 | p = 0.48 q = 1.62 | ||
| M8 | -304.00 | 5.16 | p0 = 0.80, p = 1.06, q = 14.00 (p1 = 0.20), ω = 6.69 |
4Y, 6P*, 8R, 11Q, 12K |
Note: l is the log likelihood; LRT is a likelihood ratio test, which is twice the log likelihood difference (2Δl) between null models (M1a and M7) and their alternative models (M2a and M8): M1a/M2a = 2.7 (χ2 significant value: P < 0.3); M7/M8 = 5.16 (0.05 < P < 0.1). Positively selected sites identified by the BEB method under M2a and M8 with posterior probabilities (p) > 0.6 are shown, in which those with p > 0.95 are indicated by bold and *.