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。
It is easily extracted, because it is one of a handful of genes found outside the cell nucleus, in structures called mitochondria.
细胞核DNA成功地从一只1.3万年前的鸸鹋蛋壳和一只巨大的恐鸟蛋壳中被提取出来了。
Nuclear DNA was successfully extracted from a 13,000-year-old emu eggshell and a giant moa eggshel.
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。
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.
哺乳动物中的红细胞成熟时是无核的，这意味着它们缺乏细胞核。
Erythrocytes in mammals are anucleate when mature, meaning that they lack a cell nucleus.
细胞主要呈“成纤维样”，但体积较大、形状不规则、细胞质突起多，细胞核大而疏松，核仁明显。
The cells show fibroblast-like irregular appearance, many cytoplasm ecptoma, puff and large nucleus with obvious nucleoli.
老磷酸化蛋白进入细胞核，然后迁至核斑纹。
The phosphorylated SR protein moves into the nucleus then relocates to a nuclear speckle.
由于退行性病变，细胞显示出细胞质的空泡化和细胞质和细胞核气泡现象。
Due to degenerative changes cells were showing cytoplasmic vacuolation and cytoplasmic and nuclear blebbing.
在超微结构上，肿瘤细胞具有逐渐变细的细胞核，且细胞核具有长而细腻的胞浆突起，并与突出的浆膜下的胞吞小泡相关。
Ultrastructurally, the tumor cells had tapering nuclei with long, delicate cytoplasmic processes associated with prominent subplasmalemmal pinocytotic vesicles.
虽然，像细菌一样，古生菌也没有细胞核，但是它们与你我这样的真核生物具有其他共同的特性。
While, like bacteria, archaeans don't have a cell nucleus, they share other traits with eukaryotes like you and me.
甘德森说：“那些增加的细胞核至少还会存在三个月——对于平均寿命只有两年的老鼠而言，可算是很长的一段时间了。”
The extra nuclei stick around for at least three months -- a long time for a mouse, which lives a couple of years on average, Gundersen says.
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。
But the big finding is that the cell nucleus has two compartments-and genes are only active in one.
然而，类似的事情可以通过把人类细胞核植入其他物种(比如，一只兔子)的卵细胞来完成。
However, something similar could probably be made by inserting the nucleus of a human cell into the egg of another species, such as a rabbit.
据研究者说，他们还首次完成了已灭绝的美洲乳齿象细胞核DNA序列的测定。
The researchers also made what they say are the first sequences of nuclear DNA from the extinct American mastodon.
英国——这个迄今最不歇斯底里的国家之一，最近对是否从兔子卵细胞的细胞质中制造出嵌合体细胞以及人类细胞核是否非法推迟作出决定。
Britain, so far one of the least hysterical countries, recently postponed a decision about whether making chimeric cells out of rabbit-egg cytoplasms and human nuclei should be illegal.
因为新增的细胞核不会死，它们便随时可以再造肌肉蛋白，使肌肉有了一种类似记忆的功能。
Since the extra nuclei don't die, they could be poised to make muscle proteins again, providing a type of muscle memory, he says.
在那些例子中，细胞核和细胞质融合在一起，杂交细胞制造出了表达两种动物遗传密码、完美运转的酶。
In those instances nuclei as well as cytoplasms came together and the hybrid cells made perfectly functioning enzymes that expressed the genetic code of two types of animal.
染色体是在细胞核中发现的，它是一种含有基因的线型结构，能够使不同人有不同特征。
Chromosomes, which are found in the nucleus of a cell, are thread-like structures that contain genes which determine the characteristics of an individual.
研究人员对比了非洲象和亚洲象，以及来自猛犸象和美洲乳齿象的细胞核dna序列。
The researchers compared sequences of DNA from the nuclei of African and Asian elephants, and from woolly mammoths and the American mastodon.
布朗支持想要创造混合胚胎的科学家。这混合胚胎，由人的细胞核植入动物卵细胞，经过几天的发育而成。
Brown supports scientists who want to create hybrid embryos in which the nuclei of human cells are inserted into animal eggs and allowed to grow for a few days.
从一只13，000年前的鸸鹋蛋蛋壳和一只恐鸟蛋中也成功提取出了细胞核DNA，这件工作依靠骨骼化石样本是很难完成的。
Nuclear DNA was also successfully extracted from a 13,000-year-old emu eggshell and a giant moa eggshell – something has proved difficult with fossil bone samples.
细胞核增大以容纳暴增的染色体，相应地细胞也会增大，更大的细胞意味着更大的植株。
And the size of the nucleus needed to contain all those chromosomes may make those cells bigger and bigger cells means a bigger plant.
细胞外的信号通过蛋白与蛋白和蛋白与配体的作用由细胞表面传送到细胞核。
The transmission of an extracellular signal from the surface of the cell to the nucleus by a relay of protein-protein and protein-ligand interactions.
病毒跟我们是一家人：科学家认为，十多亿年前一个大的DNA病毒在细菌细胞内居住并形成了第一个细胞核。
We are family: Scientists suspect that a large DNA-based virus took up residence inside a bacterial cell more than a billion years ago to create the first cell nucleus.
它的职能之一是充当信使将遗传信息从细胞核运送至制造蛋白质的机器——核糖体。
One of its jobs is to act as a messenger carrying genetic information from a cell's nucleus to the machinery which makes proteins.
结合物的细胞核基因是人类的，但是一小部分其它基因（位于细胞核外的称为线粒体的组织里面）来自兔子的遗传。
The nuclear genes of the result would be human, but a handful of other genes, which inhabit structures outside the nucleus, called mitochondria, would be inherited from the rabbit.
科学家们从死鼠的器官中提取细胞核，移入到另一只活鼠的卵细胞中，最终克隆出了小鼠。
The scientists extracted a cell nucleus from an organ of a dead mouse and planted it into the egg of another mouse which was alive, leading to the birth of the cloned mouse.
由于缺乏一个保存完整的细胞核，这使得对她进行像多利羊那样的克隆是不可能了。
The lack of an intact nucleus makes cloning a la Dolly the sheep impossible.
甘德森的小组检查了老化肌肉中的细胞个体，发现虽然的确有一些细胞死亡，但另一些细胞却没有完全死去，肌肉纤维或增加的细胞核也没有消失。
Gunderson's team examined individual cells in the wasting muscles and found that there is apoptosis going on, but that other cells are dying, not the muscle fibers or their extra nuclei.
甚至可能辨认出如细胞核、线粒体、叶绿体等细胞结构。
It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts.
DNA在细胞核中储存遗传信息，而RNA将DNA的信息带到细胞的其它部位，在那里指导蛋白质的合成。
While DNA stores the genetic information in the nucleus of every cell, RNA is a “carrier” of this information from DNA to other parts of the cell where the message is converted to protein.
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