英语语法分析

Methods: The hypermethylation was examined by methyl sensitive restrictive DNA endoenzyme analysis in 34 cases of angioreticuloma and the VHL gene mutations detected by PCR SSCP analysis.

方法：采用PCR SSCP法检测血管网织细胞瘤中VHL基因的突变率及甲基化，敏感限制性内切酶消化法检测血管网织细胞瘤中VHL基因的异常甲基化率。