Table 1. Results of the branch model tests of selection pressure on Nrf2 in bats.

Modela	npb	ℓ	ωOc	ω#c	Model Compared	2Δℓ	P Value
0. One ratio: ωO = ωA = ωB = ωC = ωD	41	-7676.65	0.24229	= ωO
1. Two ratio: ωO = ωB = ωC = ωD, ωA	42	-7675.60	0.2376	0.3792	1 vs.0	2.1	0.15
2. Two ratio: ωO = ωA = ωC = ωD, ωB	42	-7676.61	0.2427	0.1951	2 vs.0	0.08	0.79
3. Two ratio: ωO = ωA = ωB = ωD, ωC	42	-7675.21	0.2362	0.3911	3 vs.0	2.88	0.09
4. Two ratio: ωO = ωA = ωB = ωC, ωD	42	-7674.86	0.2498	0.1454	4 vs.0	3.57	0.06

^aSee Fig 1B for branch labels.

^bnp, number of parameters.

^cω_# (ω_A, ω_B, ω_C, ω_D) and ω_O, are the d_N/d_S values for branches A, B, C, D and other branches, respectively.