1·An octa-mer of histones package DNA into a structure called a nucleosome.
一种组蛋白的八聚物把DNA打包成一种叫做核小体的结构。
2·Nucleosome is the basic unit of chromatin.
核小体是染色质的基本单位。
3·Histones that come together to form the core of the nucleosome.
在一起形成核小体核心的组蛋白。