13例肿瘤中有12例发现杂合子突变。
方法:调查9名杂合子突变携带者和9名健康对照者。
Methods: nine heterozygous mutation carriers and nine healthy controls were investigated.
大多数父母是一个正常等位基因和一个突变等位基因的杂合子。
Most parents are heterozygotes with one normal allele and one mutated allele.
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