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DNA印迹杂交（southern blot）是进行基因组DNA特定序列定位的通用方法。一般利用琼脂糖凝胶电泳分离经限制性内切酶消化的DNA片段，将胶上的DNA变性并在原位将单链DNA片段转移至尼龙膜或其他固相支持物上，经
