Table 4. Characteristics of PCV2 strains used for the infection experiment in this study.
| Characteristics | PCV2 strains | ||
| PCV2a/rCL | PCV2b/rJF | PCV2b/rBDH | |
| GenBank No | HM038033 | HM038022 | HM038017 |
| Genotype | PCV2a | PCV2b | PCV2b |
| PassageΔ | 10 | 10 | 10 |
| Year of isolation | 2008 | 2008 | 2008 |
| Genome length (nt) | 1768 | 1767 | 1767 |
| ORF2 (aa) | 233 | 233 | 234 |
| ORF1 (aa) | 314 | 314 | 314 |
| Number of amino acids* | 0 | 0 | 1 (K) |
Note:
Δ
represents the number of passages of the PCV2 strains used for the infection experiment in this study;
*
represents the number of additional amino acids encoded by ORF2 compared with classical PCV2 strains with 233 aa in the ORF2-encoded Cap protein.