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Table 2 MC clade model parameter estimates, LRT, and p-value

From: Molecular evolution of UCP1 and the evolutionary history of mammalian non-shivering thermogenesis

Clade

p0

ω0

p2

Background ω

Foreground ω

2Δℓ

p

A_UCP1

0.57

0.02

0.39

0.17

0.24

1095

<0.001

B_UCP2/3

0.58

0.02

0.39

0.22

0.18

1087

<0.001

C_UCP2

0.58

0.02

0.38

0.22

0.14

1099

<0.001

D_UCP3

0.59

0.02

0.37

0.19

0.22

1084

<0.001

E_Eutherian_UCP1

0.56

0.02

0.4

0.17

0.29

1119

<0.001

  1. p0 is the estimated proportion of sites in site class 0 (purifying selection), ω0 is the estimated ω value for site class 0; p2 is the estimated proportion of sites in site class 2 (divergent selection), Background ω (ω2) is the estimated ω value for divergent sites on the background branches; Foreground ω (ω3) is the estimated ω value for divergent sites on the foreground branches; 2Δℓ is the LR test statistic for comparing the MC and M1a(neutral) models; p is the p-value of the LR test.