DSG3 and viral infectious disease: Taken together, these results suggested that modifying the phospho-target at CK2 motif of SwCM-CP did indeed cause a deleterious effect on viral infection in the case of PPV strain C. However, such an effect was not as drastic as that previously reported for mutations at CK2 motif of PVA-CP, and it did not extend to PPV isolates of strain D.