Method Polymerase chain reaction and restriction fragment length polymorphism were used to examine 40 oral malignant tumors for loss of heterozygosity at chromosome 3p.

• 方法应用聚合酶链反应限制性片段长度多态性分析方法对40例口腔鳞癌组织中3号染色体的等位基因杂合缺失进行测定。