Adenine will always bind with thymine and cytosine with guanine.

嘌呤总是与胸嘧合，胞嘧与鸟嘌呤合。

The Nitrogenous bases are of four different types: Adenine, Guanine, Cytosine and Thymine.

含氮碱基有四种不同的类型：嘌呤、鸟嘌呤、胞嘧胸嘧。

But for the remaining .1%, one person might have an adenine where another person has a guanine.

但对于剩下的0.1%，一个人可能有嘌呤而另一个人有鸟嘌呤。

So the caffeine doesn't even need to compete with the adenosine to fit into those receptors.

所以咖啡因不嘌呤核苷竞争受体。

There are four bases: adenosine, thymine, cytosin, and guanine.

苷、胸嘧、胞嘧鸟嘌呤。

Finally, there are some rare stones made of xanthine, which, just like uric acid, is a byproduct of purine breakdown.

最后，还有由黄嘌呤形成的石，同尿酸一样，是嘌呤分解的副产物。

Purine-rich foods include shellfish, anchovies, red meat or organ meat.

富含嘌呤的食物包括贝类、凤尾鱼、牛羊肉等红肉或内脏。

That “form” is called ATP, if you're familiar with that.

如果你熟悉这种形式的话，它的名字叫做 ATP（嘌呤核苷三磷酸）。

Then it starts to make more, using a bunch of different chemical reactions.

然后身体利很多不同的化学反应开始制造更多的嘌呤核苷三磷酸。

Now, from a chemical perspective, caffeine can be described as both a methylxanthine and an alkaloid.

从化学角度来看，咖啡因既可以被描述为甲基黄嘌呤，也可以被描述为生物碱。

There are also medications that help to decrease uric acid levels, which include xanthine oxidase inhibitors like allopurinol.

也有一些药物可以帮助降低尿酸含量，包括黄嘌呤氧化酶抑制剂，如别嘌醇。

In more severe cases though, drugs that suppress the immune system, like corticosteroids, azathioprine, or cyclosporine might be prescribed.

在某些更严重的病例中，可能会到免疫抑制药物，如糖皮质激素、硫唑嘌呤环孢素。

When you exercise, your body uses up its main source of energy, ATP, within a few seconds.

当你锻炼的时候，你的身体在几秒钟内便耗尽了其能量的主要来源，即嘌呤核苷三磷酸。

The mirror is made from crystals of guanine.

镜子由鸟嘌呤晶体制成。

Purine position 1 to pyrimidine position 1, purine position 6 to pyrimidine position 6.

嘌呤位置 1 到嘧位置 1，嘌呤位置 6 到嘧位置 6。

Since uric acid is a breakdown product of purines, a very common reason for high levels of uric acid is consuming lots of purines.

由于尿酸是嘌呤的分解产物，故高尿酸是大量摄入嘌呤的果。

Xanthine oxidase is an enzyme involved in the breakdown of purines to uric acid, so inhibiting this enzyme results in less uric acid production.

黄嘌呤氧化酶负责分解嘌呤为尿酸，所以抑制这个酶，就可以减少尿酸的生成。

Some fish eyes use guanine—one of the chemical building blocks in DNA—and have white eyeshine.

一些鱼的眼睛使鸟嘌呤——DNA 中的一种化学成分——并且有白色的眼睛。

See, DNA is made up of four different building blocks called " bases" : adenine, cytosine, guanine, and thymine.

看，DNA 由四种称为“碱基”的不同构件组成：嘌呤、胞嘧、鸟嘌呤胸嘧。

DNA is made of four organic bases: adenine, guanine, cytosine, and thymine, or A, G, C, and T.

DNA 由四种有机碱基组成：嘌呤、鸟嘌呤、胞嘧胸嘧，即 A、G、C T。