A method based on PCR was developed to amplify short tandem repeat(STR) in combination with denaturing gradient gel electrophoresis (DGGE) and silver dyeing.

• 应用聚合酶链反应扩增STR,经变性凝胶电泳,再用银染显色方法,分析苯丙氨酸羟化酶(PAH)基因内含子3中TCTA重复序列的多态性。