Results polyadenylation signal-deficient retroviruses could be packaged by PA317 packaging cells.
结果多聚腺苷酸化信号缺陷病毒可以在PA317病毒包装细胞形成病毒颗粒；
Methods The polyadenylation signal-deficient retrovirus vector mutated by PCR site-directed mutagenesis was used to make polyadenylation signal-deficient retroviruses by PA317 packaging cells.
方法使用人工定点突变多聚腺苷酸化信号的小鼠逆转录病毒载体，应用PA317病毒包装细胞获得多聚腺苷酸信号缺陷的重组逆转录病毒；
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