【摘要】 为了解决ＰＡＣ克隆ＤＮＡ制备中存在的若干问题，我们探索了几种改进方法，使提取的ＰＡＣ克隆ＤＮＡ质量明显改进，能较好地满足我们对儿童急性淋巴细胞白血病６ｑ２１缺失区抑癌基因克隆的研究目的．更多还原

【Abstract】 To solve problems occurring in the DNA preparation of the PAC clones, we used modified methods, which made obvious improvement on the quality of the PAC clone DNA. The DNA extracted may meet the requirement of our research on cloning of a tumor suppressor gene located in the minimum deletion region in 6q21 associated with child acute lymphatic Leukemia.更多还原