Sequence analysis for sites under positive selection revealed 1 site under positive selection in ORF1 and 13 sites under positive selection in ORF2 ( Non-bold percentages indicate nucleotide identities and bold percentages indicate amino acid identities. All sequence identities are based on the full-length sequences and calculated using MatGat [54] . GenBank accession numbers are as follows: porcine PtV HK1 -EU200671 [19] ; bovine PtV HK1 -EU200669 [19] ; bovine PtV HK5 -; ovine PtV-; human PtV PARV4 C51-4 -DQ873387 [55] ; bovine PV 2 -AF406966 [25] ; bovine PV 3 -AF406967 [25] ; minute virus of mice -DQ196317 [56] ; human PV B19 -AY044266 [57] ; bovine bocavirus -DQ335247 [58] ; human bocavirus -FJ858259 [59] ; Aleutian mink disease virus -NC_001662 [61] ; bovine adeno-associated virus (AAV) -AY388617 [60] . doi:10.1371/journal.pone.0025619.t002