Adaptive evolution and functional constraint at TLR4 during the secondary aquatic adaptation and diversification of cetaceans

Table 1 Tests for positive selection at cetacean TLR4 using branch model and site models

Model	Models Compared	-2lnΔL	df	pvalue	Proportion of Sites under Selection	ω (dN/dS) of Sites under Selection
Site model	M1 versus M2	16.10	2	< 0.0001	0.033	3.45
	M7 versus M8	16.48	2	< 0.0001	0.033	3.55
	M8a versus M8	16.10	1	< 0.0001
Branch model	M0 versus full	44.13	31	0.0595

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