Now the problem with that is a problem I mentioned before,

但现在的问题是我之前提到过的
that most human genes are not just a straight sequence

大多数人类基因不是一个连续的序列
from beginning to end of the protein that you're interested in.

从头到尾都对应你想要的蛋白质
There are encoding regions called exons

编码蛋白质的部分叫外显子
and those are interrupted by non-coding regions called introns.

外显子被不编码蛋白质的内含子打断
If I cut up just DNA from the chromosome,

如果我切割的恰好是染色体上的
what's called genomic DNA,

基因组DNA
then I'm going to have

那我切成的片段上
both exons and introns within the fragments that I create.

就会同时有外显子和内含子
That might be a good way to do it

这或许是个好方法
but it's going to be more of a challenge because you might -

但这会带来更大的问题因为也许--
you're going to have a lot of these non-coding sequences

会有许多不编码蛋白质的序列