The promoter in this case is called the lac promoter and normally in micro-organisms that lac promoter is used to produce a gene called lacZ which makes a protein called beta-galactosidase.

在这个例子中的启动子称作lac启动子,通常在微生物中,lac启动子是用来生成,一段叫lacZ的基因,这段基因,能制造一种蛋白叫β-半乳糖苷酶

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