Table 1.

Log Likelihood (l) values and parameter estimates under different models (branch models) in PAML

Model	l	ω0	ωL	ωG
A. One Ratio: ω0 = ωL = ωG	−28843.35	0.254	ω0	ω0
B. Two Ratios: ω0 = ωG; ωL	−28825.10	0.241	0.466	ω0
C. Two Ratios: ω0 = ωL; ωG	−28842.52	0.254	ω0	0.996
D. Two Ratios: ω0; ωL = ωG	−28824.44	0.241	0.469	ωL
E. Three Ratios: ω0; ωL; ωG	−28824.20	0.241	0.466	0.997
F. Two Ratios: ω0 = ωG; ωL = 1	−28848.59	0.241	1.000	ω0
G. Two Ratios: ω0 = ωL; ωG = 1	−28842.71	0.254	ω0	1.000
H. Two Ratios: ω0; ωL = ωG = 1	−28847.69	0.241	1.000	1.000
I. Three Ratios: ω0; ωG; ωL = 1	−28848.56	0.241	1.000	1.000
J. Three Ratios: ω0; ωG = 1; ωL	−28824.20	0.241	0.466	1.000
K. Free Ratio	−28505.20	---	---	---