the cell nucleus

It is easily extracted, because it is one of a handful of genes found outside the cell nucleus, in structures called mitochondria.

它很容易提取，因为它是在细胞核之外、叫做线粒体的结构里被发现的少量基因之一。

Once synthesized, the histones move into the cell nucleus, where a section of DNA wraps around them to form a structure that resembles beads, or knots, on a string.

一旦合成，组蛋白就会进入细胞核，细胞核内的 DNA 片段会将组蛋白包裹起来，形成一种类似串珠或绳结的结构。

But the big finding is that the cell nucleus has two compartments-and genes are only active in one.

研究者们的另一重大发现是，细胞核中存在两个间隔区域，而其中只有一个区域的基因是活跃的。