Sometimes subtle changes in the structure of a protein can convert it from an active state into an inactive state.

有时蛋白质结构上一些很小的变化,就能将其由激活态转变为非激活态

耶鲁公开课 - 生物医学工程探索课程节选

That is a way of putting a cloned gene into a micro-organism and then using that micro-organism as sort of a factory for the protein.

这方法把克隆基因植入微生物之后,将其作为某种形式的蛋白质工厂

耶鲁公开课 - 生物医学工程探索课程节选

What if I collect that blood from patients that are already infected with Hepatitis B, purify the Hepatitis B protein, and inject that back into people?

如果我采集那些乙肝患者的血液,抽提出乙肝病毒的蛋白质,并且将其回注入人体内,将会如何呢

耶鲁公开课 - 生物医学工程探索课程节选

In that case, we took the gene for the Hepatitis B protein.

在此种情况下,我们将乙肝病毒的基因同蛋白质外壳分离

耶鲁公开课 - 生物医学工程探索课程节选