Figure 1From: Current knowledge on epidemiology and evolution of novel porcine circovirus 4Genomic characterization of PCV4. The PCV4 genome, a single-stranded circular DNA genome with 1770 nt, contains two major ORF that differ from those in PCV1, PCV2 and PCV3. However, the stem-loop of PCV4 has a conserved 9-nt nonanucleotide sequence (CAGTATTAC) located within the intergenic region between ORF1 and ORF2.Back to article page