Table 2. Parameter estimates under branch-specific models among the four MEF2 branches for MADS and MEF2s coding regions.

Branch-specific Models	ωB	ωADC	ωD	ωAC	ωC	ωA		2Δ	p-value
H0: ωB = ωADC = ωD = ωAC = ωC = ωA	0.012	0.012	0.012	0.012	0.012	0.012	−1693.33
H1: ωB≠ωADC = ωD = ωAC = ωC = ωA	0.073	0.013	0.013	0.013	0.013	0.013	−1692.44	1.78	0.182
H2: ωB = ωD = ωAC = ωC = ωA≠ωADC	0.013	0.073	0.013	0.013	0.013	0.013	−1692.44	1.78	0.182
H3: ωB = ωADC = ωAC = ωC = ωA≠ωD	0.012	0.012	0.051	0.012	0.012	0.012	−1692.53	1.61	0.205
H4: ωB = ωADC = ωD = ωC = ωA≠ωAC	0.013	0.013	0.013	0.012	0.013	0.013	−1693.43	0.20	0.655
H5: ωB = ωADC = ωD = ωAC = ωA≠ωC	0.012	0.012	0.012	0.012	0.001	0.012	−1689.91	6.84	0.0089**
H6: ωB = ωADC = ωD = ωAC = ωC≠ωA	0.018	0.018	0.018	0.018	0.018	0.001	−1686.80	13.05	0.0003**

Note: The topology and branch-specific ω ratios are presented in Figure S2. The degree of freedom (df) is 1 for the comparisons of null model H0 versus the alternative model from H1 to H6.

**Significance with .