Table 1. Summary of the multiple sequence alignments analyses.

Gene	Size, in nt	Polymorphic sites	Syn.	Non Syn.	π	k	dN/dS
B646L	399	110 (27.6%)	62	60	0.03416	13.629	0.223
B646L w/o P	393	–	–	–	–	–	–
E183L	480	263 (54.7%)	88	214	0.07283	34.960	0.286
E183L w/o P	453	–	–	–	–	–	–
CP204L	543	154 (28.2%)	83	88	0.06738	36.588	1.123
CP204L w/o P	534	–	–	–	–	–	–

π: average diversity per site between two sequences (number of nucleotide differences per site between two sequences). k: average number of nucleotide differences between two sequences. w/o P: without codons under positive selection.