There are multiple mechanisms that a cell can use to decide which genes it is expressing at any one time and which ones are not expressed.

在某一时刻,决定细胞中哪些基因表达,哪些基因不表达的机理十分复杂

耶鲁公开课 - 生物医学工程探索课程节选

You do that by expressing the genes in the mice in the way that I described on the last slide and it's shown in a little bit more detail on this slide.

按照我上张幻灯片讲过的方法,在小鼠中表达外源基因,这张幻灯片中对此有更详细的表述

耶鲁公开课 - 生物医学工程探索课程节选

The difference the real difference is in what genes its expressing of the total number of genes in the human genome and therefore if it's expressing these unique this unique set of genes.

真正的不同之处是,在这些细胞中,表达的是人类全部基因中的不同基因,因此如果细胞表达的是,这组独特的基因

耶鲁公开课 - 生物医学工程探索课程节选

Out of all the genes that are on the human genome which fraction is this particular cell using, which fraction is it expressing determines what proteins are present in the cell, determines what work or what activities the cell can engage in.

人类基因组全部基因中的,特定细胞所表达的基因片段,细胞表达的是哪段基因,决定了细胞中存在什么样的蛋白,决定了细胞会有什么样的功能,或者参与何种生命活动

耶鲁公开课 - 生物医学工程探索课程节选