. 2020 Jul 3;3:347. doi: 10.1038/s42003-020-1078-y

Table 2.

PAML analyses for the tcdA and tcdB genes.

Models	Gene	Hypothesis (model)	lnL^a	p value^b	Hypothesis-testing	ω^c
M1a versus M2a	tcdA	Null (M1a)	−11405.514	<0.001	Positive selection	5.889
	tcdA	Alternative (M2a)	−11394.345	<0.001	Positive selection	5.889
	tcdB	Null (M1a)	−18796.020	0.010	Positive selection	35.957
	tcdB	Alternative (M2a)	−18791.455	0.010	Positive selection	35.957
M8a versus M8	tcdA	Null (M8a)	−11394.667	<0.001	Positive selection	4.869
	tcdA	Alternative (M8)	−11405.514	<0.001	Positive selection	4.869
	tcdB	Null (M8a)	−18763.111	0.0017	Positive selection	27.059
	tcdB	Alternative (M8)	−18768.022	0.0017	Positive selection	27.059

^aInL is the log-likelihood score.

^bLikelihood ratio test to detect positive selection, p < 0.05 was considered significant.

^cRatio of non-synonymous and synonymous substitution.