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Steroids are small molecules - much smaller than proteins - smaller molecules that tend to be hydrophobic or lipid soluble.
类固醇是小分子物质,比蛋白质小得多,这类小分子是非水溶性的,或者说是脂溶性的
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Fatty acid chains are fat molecules, they behave, if you have a lot of them in solution like oil.
脂肪酸链就是脂肪分子,它们看上去好像,如果你见过富含脂类的溶液,比如油
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I'll show how that works in just a moment, but estrogen for example, is one of those.
我马上就给你们讲这个过程,举这类分子中的一种,雌激素作为例子
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Well, one way you can get it is by mixing the gene with lipids, with lipid molecules.
一种方法可以将基因与脂质体混合,同脂类分子混合
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Lipids are really complex molecules on their own right, but because of their particular kind of complexity they allow certain biological structures to form.
脂类本身是非常复杂的分子,但正是它们独特的复杂性,使它们能够形成某些生物结构
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An example is production of certain molecules called cytokines by T-cells that activate themselves.
细胞能分泌这类叫做细胞因子的分子,实现自激活
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There are two general classes of molecules that are produced by the endocrine system.
内分泌系统产生的分子通常有两类
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These are fascinating molecules that turn out to be ubiquitous.
这类奇妙的分子是普遍存在的
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Steroid hormones, on the other hand, molecules like testosterone and estrogen, progesterone, the sex steroids that determine sexual characteristics and are important for reproductive function are molecules that are all derived from a similar source.
另一方面,类固醇类激素,像睾丸激素,雌激素,黄体酮这样的分子,性激素决定了性征,它对生殖功能十分重要,这类分子有着相似的来源
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It gets produced in response to a signal so there's a binding of a ligand to a receptor, the enzyme that does this conversion is activated and more cycle AMP is released.
这类分子的产生是对信号做出的一种反应,当配体和受体结合时,催化这种转化过程的酶被激活,更多的cAMP释放出来
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