Table 1. Functional divergence between Sdr4L subfamilies.

Group 1	Group 2	Type-I			Type-II
		Θ±SE	LRT	Qk > 0.9	Θ±SE	Qk > 0.9
I	II	0.759±0.148	26.346**	27	0.158±0.146	32
I	VI	0.334±0.193	0.003	0	0.195±0.105	32
I	VIIIb	0.459±0.185	6.147*	1	0.281±0.094	38
I	IV	0.064±0.164	0.153	0	0.188±0.108	30
I	VIIIa	0.214±0.248	0.746	0	0.148±0.110	25
II	VI	0.787±0.254	9.590**	13	0.272±0.129	50
II	VIIIb	0.839±0.207	16.420**	33	0.289±0.115	43
II	IV	0.944±0.238	15.718**	36	0.163±0.138	47
II	VIIIa	0.615±0.336	3.356	5	0.151±0.137	45
VI	VIIIb	0.642±0.211	9.257**	1	0.188±0.072	21
VI	IV	0.001±0.022	0.000	0	0.014±0.083	4
VI	VIIIa	0.178±0.313	0.325	0	0.009±0.081	5
VIIIb	IV	0.174±0.146	1.416	0	0.006±0.071	2
VIIIb	VIIIa	0.383±0.205	3.499	0	0.033±0.067	10
IV	VIIIa	0.001±0.022	0.000	0	-0.076±0.078	0

Note: θI and θII, the coefficients of Type I and Type II functional divergence between two gene clusters; LRT, likelihood ratio Statistic

*, P < 0.05

**, P < 0.01

Qk, posterior probability. Large Qk values indicate a high probability of functional constraint (or the evolutionary rate) or that physicochemical properties of a given amino acid site differs between two clusters.