The positive control cell line DNA was mixed in different proportions with the DNA extracted from reactive lymphoid tissue to test the sensitivity of the touch-down PCR.

阳性细胞系DNA模板与反应增生性淋巴组织DNA按不同比例混合后扩增，检测降落式PCR的灵敏度。

youdao

But in control group, positive rate was only less than 5%, and we could only see a single normal DNA strip.

对照细胞呈现阳性染色者每视野不超过5%，DNA凝胶电泳只见一条正常基因组dna带。

youdao

A strong positive test response was observed producing comet tails of a length and DNA content not observed in either viable or dead control cells.

观测到一个强测试反响，产生一个一定长度的彗星尾。在有生机的或者死亡的控制细胞都没有观测到DNA内容。

youdao