...被替换引起的基因结构改变，从而形 病因： 成的一种遗传病 异常的基因片段aaccg ttggc1 2 3 4 5替换atccg taggc（正常基因片段）a ccg t ggc 缺失 attccg 增添 taaggc (二）基因突变的概念dna分子中发生碱基对的替换、增添和缺失， 而引起的基因结构的改变。
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结果：从正常肝组织与模型组肝癌组织中分离出32个差异显示的基因片段；
The results showed that 32 genetic segments indicating difference were separated from the normal liver tissues and the liver cancer tissues of the model groups.
方法：应用聚合酶链反应（PCR）-双酶切法，对23例CMT1患者和30例正常人进行基因特异性连接片段的检测。
METHODS:Polymerase chain reaction(PCR) combined with restriction enzyme digest ion were used to detect gene specific junction fragments of the 23 CMT1 patients and 30 normal controls.
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