线粒体DNA不同步的D环复制形式导致了控制区局部形成三链结构，其单链的构造使其更易受到过氧化物的损害。
Second, it has a triple strand DNA architecture generated by the synthesis of a short piece of the H strand which is highly sensitive to oxidative damage due to its single strand condition.
应用链霉菌抗生物素蛋白—过氧化物酶免疫组织化学方法检测15例部分性葡萄胎、55例完全性葡萄胎滋养细胞中MMP-9、TIMP-1表达。
Immunohistochemical streptavidin-peroxidase (S-P) method was used to detect the expression of MMP-9, TIMP-1, in 15 cases with partial hydatidiform moles and 55 cases with complete hydatidiform mole.
方法：采用链酶亲和素-过氧化物酶标记免疫组织化学方法，在PC NA阳性标本中测定增殖指数(PI)。
Methods the PCNA index (PI) was detected by the immunohistochemistry method of streptavidin in the PCNA positive samples.
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