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Table 3
Average non-synonymous substitutions per non-synonymous site (dN) and synonymous substitutions per synonymous sites (dS)
MHC	Sites	N	d_N	d_S	d_N/d_S	Z	P
DQA1	ABS	20	0.152±0.048	0.132±0.080	1.15	0.247	0.405
	Non-ABS	62	0.081±0.020	0.113±0.031	0.72	−0.882	0.380
	All	82	0.100±0.020	0.114±0.026	0.88	−0.426	0.671
DQB1	ABS	23	0.247±0.066	0.056±0.033	4.41	2.477	0.01
	Non-ABS	62	0.063±0.014	0.092±0.022	0.68	−1.104	0.272
	All	85	0.103±0.018	0.083±0.017	1.24	0.709	0.480

Luo et al. BMC Evolutionary Biology 2012 12:207 doi:10.1186/1471-2148-12-207

Table 3