Fig. 3.

Phylogenetic analysis of PCV3 based on ORF2 and identification of group specific amino acid motifs. a Phylogenetic tree based on ORF2 of 24 German PCV3 strains (●) and 30 PCV3 reference strains (GenBank accession number, country and year of collection; more details are listed in Table A1). The tree was constructed using the neighbor joining method (p-distance model; 1000 bootstraps; only bootstrap values above 50 are shown). The scale bar indicates nucleotide substitutions per site. b Amino acid alignments of the putative ORFs 1, 2 and 3 were used to identify group specific motifs