The an sequence W-X7-H-X3-C-X I -C-X5-H, a motifshared by chicken anemia virus (CAV ), was also present in ORF2 of these variants.

• 而ORF2蛋白有类似CAV ORF2的基序（W-X7-H-X3-C-X1-C-X5-H）。