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Doctor Chan says the effects appeared especially strong among patients with tumors expressing an enzyme called COX-2.
VOA: special.2009.09.01
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So, she is interested in how this molecule, gemcitabine, inhibits an enzyme. So, to do those studies, she needs to know a lot of the stuff on this list.
她对这个分子，二氟脱氧胞嘧啶核苷怎么抑制酶很感兴趣，要做这些研究。
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They often involve networks of reactions, not just one enzyme but a series of enzymes that serve to amplify each other.
这些反应通常包括一个反应网络,不只是一种酶,而是一系列的酶来进行级联放大
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The Royal Swedish Academy of Sciences says it is honoring the researchers for showing how telomeres and the enzyme that makes them protect chromosomes.
VOA: special.2009.12.08
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She needs to know this enzyme works by both acid base chemistry, and oxidation reduction.
她要知道酶催化，她需要知道这种酶,在酸碱环境下的反应和氧化还原反应。
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The researchers developed a mixture of chemicals that interfered with the performance of the enzyme.
VOA: special.2010.04.07
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Or you could ask the question, I have this restriction enzyme, at what regions on this plasmid will it cut?
你也可以这样问,我的这种限制性内切酶,会从质粒的哪个区域切开呢
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Some scientists are studying whether drugs that block the enzyme can help fight cancer.
VOA: special.2009.10.07
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What a kinase enzyme does is that it recognizes this protein, and for example, the tyrosine that's on the protein.
激酶能够识别这类蛋白,例如,包含酪氨酸的蛋白
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But,cell death is delayed if a lot of the enzyme telomerase is produced.
VOA: special.2009.10.07
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Of course, she needs to know the basic principles, but she's also talking about it an enzyme, so she needs to know about enzyme catalysis.
她需要知道这表上的许多东西，当然她需要知道到这些基本原理，她研究的是一种酶。
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One form of this enzyme makes the prostaglandin that causes pain and swelling.
VOA: special.2010.12.14
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In this case, this particular restriction enzyme cuts symmetrically like this, but not at the same point.
在我们这种情况下,这个限制性内切酶总是这样对称地切割,但两条链切割的位点不一样
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Telomerase is the enzyme in the body that builds the telomeres.
VOA: special.2009.12.08
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This restriction enzyme was found in a natural source, it was found in a micro-organism called E.coli.
这个限制性内切酶源于自然界,是从名为大肠杆菌的微生物中发现的
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The weakness is an enzyme called N-myristoyl transferase,or NMT.
VOA: special.2010.04.07
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So, these are receptors, for example, that bind the ligand and then liberate an enzyme which promotes some sort of reaction inside the cell, often it's kinases but doesn't have to be.
例如,这里是受体,与配体相结合,激活一种酶,这种酶能够催化细胞内的某些反应,这些酶通常都是激酶,但不全是
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Miz Blackburn and Carol Greider identified the enzyme telomerase.
VOA: special.2009.12.08
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A reaction performed by one enzyme creates a product that stimulates another enzyme that creates a product, and stimulates another enzyme, and through this cascade of reactions you amplify and carry the signal forward.
一种酶催化生成的产物会活化另一种酶,而它催化的产物又能激活其他酶,催化反应生成另一种产物,通过这层层反应,信号被放大,并不断向前传递
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Another form of the enzyme creates a protective effect.
VOA: special.2009.10.20
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In some cells they're recycled, that is the cell is able to take up the neurotransmitter after it's released and restore it, but most often there are enzyme systems inside the pre-synaptic membrane where those neurotransmitters are synthesized.
在一些细胞中神经递质可以循环利用,这些细胞可以吸收,已经释放出的神经递质并重新储存起来,但更常见的是突触前膜中含有酶系统,在此合成神经递质
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The scientists named the enzyme telomerase.
VOA: special.2009.10.07
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Another family is receptor tyrosine kinases, I'll show another picture in a moment that tells you more about what a kinase is, but a kinase is basically an enzyme that can add a phosphorous to another molecule.
另一类是酪氨酸激酶受体,马上我给你们看另一张图,这张图会更详细地告诉你们激酶是什么,激酶是一种能够,向其他分子上添加磷酸基团的酶
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He says their research has identified an "Achilles' heel" of the parasite - an enzyme that is needed for the parasite's survival.
VOA: standard.2010.04.05
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If that protein is an enzyme then you've and you've switched it from an 'off' position where it's not catalyzing a reaction to an 'on' position where it is, you've changed the biochemical state of the cell, you've changed the chemical reactions that can occur within the cell, and you've changed its behavior.
如果这种蛋白是一种酶的话,你就能够将酶从无催化作用的静息态,激活至能催化反应的激活态,你改变了细胞的生化状态,也改变了细胞内发生的化学反应,改变了细胞的行为
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"The outer layers will slow down the penetration of digestive enzyme into the starch part so that the release of the sugar into the bloodstream will be slow for brown rice in comparison with white rice."
VOA: standard.2010.06.25
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You first separated your DNA, let the primers bind, then turn on the enzyme, and it makes copies of each one of these.
首先解旋DNA双链,使引物结合,接着激活聚合酶,最终得到各链的复制产物
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HIV, HIV is a natural virus that contains an enzyme in it.
IV,HIV是一种自然病毒,里面有一种酶
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If you have two different ligands stimulating two different receptors, and one causes activation of this enzyme and generation of cyclic AMP, cyclic AMP levels will start to rise.
如果有两种不同的配体,刺激不同的受体,一种能够活化酶,并促进生成cAMP,cAMP的水平就会升高
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If I cut both the plasmid and my DNA of interest with the same restriction enzyme I'm going to end up with the same sticky ends on both molecules.
如果用同一种限制性内切酶,来切割质粒和我感兴趣的DNA,在两个分子上就能得到同样的粘性末端
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