Fig. 2

Nucleotide sequence alignment of a fragment of ORF2 genes of the 17 PCV2 strains. A segment of aligned PCV2 nucleotide sequences from this study and homologous reference sequences of four major genogroups of PCV2 obtained from GenBank. The green box shows the 3′ end of ORF2 gene where the stop codon mutation (TAA → AAG) gives rise to longer ORF2 gene (705 nt) that characterizes PCV2d capsid gene [39]. The black arrows show some of the marker nucleotides that differentiate PCV2c from PCV2d [9]