Well a negative control we learned about from the trp operon.

好的，我们从操纵子中了解到负调控的概念。

And the other thing they'll have in an operon is called an operator.

在操纵子中，另一个重要的组成部分叫做操纵。

Positive control example I'll give you is the lac operon.

我给你举的一个正调控的例子是乳糖操纵子。

And the negative control is the trp operon.

负调控的例子是操纵子。

And so let's talk about how this works is the lac operon in bacteria because this the first one we really started to understand.

那么，让我们来谈谈这个机制是如何在细菌的乳糖操纵子中运作的，为这是我们最先开始理解的一个例子。