目的：探讨大肠杆菌嘌呤核苷磷酸化酶自杀基因对胃癌细胞MKN-45的抑制及杀伤作用，并证实旁观者效应。
Objective To study the effects E. coli purine nucleoside phosphorylase suicide gene on human gastric cancer MKN-45 cells as well as the bystander effect.
目的：选择多核苷酸磷酸化酶快速离子交换层析的最佳条件。
OBJECTIVE:Selection of optimal chromatographic conditions for purification of polynucleotide phosphorylase in fast ion-exchange chromatography.
目的：选择多核苷酸磷酸化酶快速离子交换层析的最佳条件。
OBJECTIVE:Selection of optimal chromatographic conditions for purification of polynucleotide phosphorylase in fast ion-exchange chromatography.
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