Once synthesized, the histones move into the cellnucleus, 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。
2
It is easily extracted, because it is one of a handful of genes found outside the cellnucleus, 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。
3
However, something similar could probably be made by inserting the nucleusof a human cell into the egg of another species, such as a rabbit.