Results of LRT for selection of the CYP3 family in Actinopterygii.

Selection analysis by three kinds of models was performed using codeml implemented in PAML. np: number of free parameters. lnL: log likelihood. LRT: likelihood ratio test. df: degrees of freedom. 2ΔlnL: twice the log-likelihood difference of the models compared. The significant tests at 5% cutoff are labeled with * and at 1% cutoff are labeled with **.