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Phenotype of ALV-J strain TBC-J6 with multiple mutations in the NGSs and EAV-HP. (a) Viral titers of wide-type, N193, Δ185/193/209/226, and Δ185/209/226 after 3 continuous passages in DF-1 cells. (b) Viral titers of TBC-J6, EAV-HP, EAV-HP-D191N, and EAV-HP-D191A after 3 passages in DF-1 cells.
