来自《耶鲁大学开放课程：生物医学工程探索 第4集 第4集》

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  the host will recognize as a signal to
  宿主可以识别启动子并视作启动信号
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  transcribe and translate this protein.
  从而进行转录并翻译目标蛋白
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  We'll talk more about promoters as they go on,
  我们以后还会谈到更多有关启动子的知识
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  for now let's just assume that
  而现在就假设这个
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  we have a promoter that works in this particular cell.
  特定的宿主细胞里有个启动子
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  The promoter in this case is called the lac promoter and
  在这个例子中的启动子称作lac启动子
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  normally in micro-organisms that
  通常在微生物中
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  lac promoter is used to
  lac启动子是用来生成
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  produce a gene called lacZ
  一段叫lacZ的基因 这段基因
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  which makes a protein called beta-galactosidase.
  能制造一种蛋白叫β-半乳糖苷酶
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  What we're going to do is take this plasmid,
  我们要做的就是提取包含
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  with its promoter gene construct in it
  它自己的启动子基因的质粒