Methods Denaturant gradient gel electrophoresis (DGGE) was used to scan all DNA fragments of 3 genes mentioned above in AD group (15 cases) and elderly control group (241 cases).

• 方法 应用DNA变性梯度凝胶电泳方法对15例AD和241例老年对照组的上述3个基因的DNA片段进行扫描分析。