Table 1 Summary of PAML analyses of ZPC multispecies alignments. Significant results are in bold.

M0

ω = 0.26

ω = 0.32

ω = 0.12

M1a estimates

P1 = 0.71 ω1 = 0.096

P1 = 0.69 w1 = 0.16

P1 = 0.93 ω1 = 0.07

P2 = 0.29 ω2 = 1.0

P2 = 0.31 w2 = 1.0

P2 = 0.07 ω2 = 1.0

M2a estimates

P1 = 0.71 ω1 = 0.096

P1 = 0.70 w1 = 0.16

P1 = 0.95 ω1 = 0.07

P2+P3 = 0.29 ω2 = ω3 = 1.0

P2 = 0.0 ω2 = 1.0

P2 = 0.0 ω2 = 1.0

P3 = 0.30 ω3 = 1.04

P3 = 0.053 ω3 = 1.27

2Δlogl(M1a-M2a)

0

0.07

0.28

M1a-M2a p(X²)

1

0.97

0.87

M8a estimates

P(beta) = 0.86

P(beta) = 0.72

P(beta) = 0.94

P1 = 0.16 ω1 = 1.0

P1 = 0.28 ω1 = 1.0

P1 = 0.065 ω1 = 1.0

M8 positive selection

P = 0.097 ω = 1.32

P = 0.24 ω = 1.16

P = 0.049 ω = 1.29

2Δlogl(M7-M8)

10.9

14.9

3.67

M7-M8 p(X²)

0.004

0.0006

0.16

2Δlogl(M8a-M8)

3.00

0.75

0.32

M8a-M8 p(X²)

0.084

0.19

0.58