Figure 2.

(A) A maximum likelihood phylogenetic tree of the aligned genome sequences of circoviruses and an illustration of the genome organization of penguin circovirus (PenCV); (B) a maximum likelihood phylogenetic tree of the capsid protein (CP) amino acid sequences; and (C) replication-associated protein (Rep) amino acid sequences. The percentage pairwise identities relative to PenCVs are shown next to the taxa names (with GenBank accession numbers). * Viruses likely infect avian species, as they have been recovered from fecal and insect vectors.