有几个监视器,都运行得如此之快,很难看到它们所显示的内容。 Wu按下按钮并放慢了一个图像。吴说,在这里,您会看到恐龙DNA的一小部分碎片的实际结构。请注意,该序列由四个碱性化合物 - 腺嘌呤,胸胺,鸟嘌呤和胞嘧啶组成。这一量的DNA可能包含指示单个蛋白质,一种激素或酶。完整的DNA分子包含其中30亿个碱基。如果我们每天八个小时看一次这样的屏幕,那么查看整个DNA链仍需要两年多的时间。这么大。
(There were several monitors, all running so fast it was hard to see what they were showing. Wu pushed a button and slowed one image. Here you see the actual structure of a small fragment of dinosaur DNA, Wu said. Notice the sequence is made up of four basic compounds-adenine, thymine, guanine, and cytosine. This amount of DNA probably contains instructions to make a single protein-say, a hormone or an enzyme. The full DNA molecule contains three billion of these bases. If we looked at a screen like this once a second, for eight hours a day, it'd still take more than two years to look at the entire DNA strand. It's that big.)