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。

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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。

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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。

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"All genes are encoded by DNA and the DNA is present in the chromosomes in the cell nucleus and telomeres, they are the ends of the chromosomes and they have an important function to protect the chromosomes and maintain the integrity of the chromosomes."

VOA: special.2009.10.07

One of the most obvious things about a red blood cell is it doesn't have nucleus, it has no nucleus.

红细胞最为明显的不同就是,它是无核的,它没有细胞核

耶鲁公开课 - 生物医学工程探索课程节选

Many steroid hormones act because they bind to cellulars - to receptors that are deep within the cell, often inside the nucleus.

许多类固醇激素能够起效是因为,其与存在于细胞内部的受体相结合,这类受体通常在细胞核内

耶鲁公开课 - 生物医学工程探索课程节选

Vitamin D works inside the cell nucleus as a basic building block to help turn genes on or off.

FORBES: Magazine Article

It also cuts the lines of communication between any receptors which are still activated and the cell nucleus, so that the nucleus cannot take instructions from the hormone.

ECONOMIST: Treating prostate cancer

In reality, DNA is twisted and folded up inside the cell nucleus, with the result that bits of the molecule that seem far apart on a map are actually next to each other in the nucleus.

ECONOMIST: Genomics has not yet delivered the drugs, but it will