目的考察并确定多聚乙烯亚胺（PEI）最佳的体外细胞转染条件，评价PEI作为基因转染试剂的可行性。
OBJECTIVE To investigate the optimum condition of polyethylenimine(PEI) for gene transfer to A549 cells.
目的考察并确定多聚乙烯亚胺（PEI）最佳的体外细胞转染条件，评价PEI作为基因转染试剂的可行性。
OBJECTIVE To investigate the optimum condition of polyethylenimine(PEI) for gene transfer to A549 cells.
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