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Sequences of 3′-UTR downstream (the compared region is from nt 27,217 to nt 27,283, 67 bp according to TW2296/95w) of the N protein gene from different passages of strain TW2296/95 were compared. − stands for deletion. Changed nucleotides are underlined. Specific passages of the virus are noted with numbers at the end of the virus name (TW2296/95). w the 3rd passage, vac the 79th passage
