The Evolutionary Pattern and the Regulation of Stearoyl-CoA Desaturase Genes

Table 1

Selective patterns of scd genes estimated in CODEML.

Model	ln 𝐿	Parameters estimates	2Δ𝐿	Positively selected sites
Branch-specific models
M0	−20340.727636	𝜔=0.08684
Model B
Scd1 two ratio	−20339.045042	𝜔0=0.09207, 𝜔1=0.07951	3.365188
Scd5 two ratio	−20318.455800	𝜔0=0.06146, 𝜔1=0.09735	44.542672^###
Model C; Three ratio	−20315.506084	𝜔𝑠𝑐𝑑1=0.06140; 𝜔𝑠𝑐𝑑5=0.09198; 𝜔invertebrate𝑠𝑐𝑑=0.11788	50.443104^###
Branch-site models
Scd1
Model A1	−20079.883939	𝜔0=0.06891, 𝜔1=1, 𝜔2=1; 𝑃0=0.85305, 𝑃1=0.04177
M1a	−20178.290653	𝜔0=0.07950, 𝜔1=1; 𝑃0=0.91928, 𝑃1=0.08072	196.813428^###
Model A	−20079.883939	𝜔0 = 0.06891, 𝜔1=1, 𝜔2=1; 𝑃0=0.85305, 𝑃1=0.04177	0	108L**, 109F**, 201A**, 206S, 212K**, 247Y**, 254A, 255I*, 276K**, 289V*, 315P, 330Y, 339A
Scd5
Model A1	−20129.099054	𝜔0=0.07500, 𝜔1=1, 𝜔2=1; 𝑃0=0.88996, 𝑃1=0.05968
M1a	−20168.513281	𝜔0=0.07951, 𝜔1=1; 𝑃0=0.91900, 𝑃1=0.08100	78.828454^###
Model A	−20129.099054	𝜔0=0.07500, 𝜔1=1, 𝜔2=1; 𝑃0=0.88996, 𝑃1=0.05968	0	157A**, 194P**, 215M**, 223P, 230I, 338A**

^###𝑃<0.001; ^##0.001<𝑃<0.01;
** 𝑃>0.99; *𝑃>0.95.