That's an example of symmetric sequence and it happens that most restriction enzymes also recognize those spaces.
这是一个对称序列的例子,大多数限制性内切酶都能识别这些序列
So having a place that the cell knows - where the cell knows how to replicate is important and so plasmids have an origin of replication.
所以得有一个细胞能识别的区域,能使细胞知道,怎样来复制 这很重要,因此质粒上带有一个复制起点
We're interested only really in two things: One, can you differentiate between duple and triple meter; and two, can you recognize some very basic rhythmic patterns?
我们这里只关注两件事,一,你能不能区分两拍子和三拍子,二,你能不能识别一些简单的基本节奏形式
They do that in a very special way in that they - restriction enzymes are able to identify a particular sequence of bases in a gene.
限制性内切酶的工作机制很特别,它能识别基因中的一段特定的碱基序列
Can you identify any chords in this particular piece?"
你能识别出这一段的几个和弦吗
The other way that they define - or find stem cells is that over the years of studying them we've begun to recognize some of the proteins, the specific proteins that are produced by these characteristic cells.
而另外一种能让研究人员定位,或者找到干细胞的方法就是,多年研究后,我们开始能识别一些蛋白,这些特定的蛋白是由,这种特殊的细胞生成的
Most restriction enzyme also recognize symmetric sequences of DNA, GAATTC for example.
大多数限制性内切酶,也能识别DNA的对称序列,例如GAATTC
Well one way you could do it is by saying 'if I have this one base pair difference then this sequence is going to be cut by a specific restriction enzyme that recognizes the sequence CTGAGGA'.
一种方法是通过考虑,"如果我有这个不同的碱基对,那该序列必然会,被特定的限制酶识别并切割,这个特定的限制酶能识别,CTGAGGA "
If you cut and you open up a segment of DNA then you've left these sticky ends, for example and these sticky ends are capable of recognizing each other by the process of hybridization.
如果你进行切割打开一个DNA片段,就会留下,比如说,这些粘性末端,这些粘性末端能在杂交的过程中互相识别
应用推荐