That can happen but that's abnormal, but changes in maybe the chemistry of the backbone that holds the nucleotides together.
这可能发生的,但属于非正常的变化,而是改变诸如维持核苷酸序列的,主链的化学结构
Now, in your book, there's an example of plasmid where I've given you the exact sequence of nucleotides that makes up the whole double stranded DNA molecule.
现在在你们书里,有个质粒样本,我将组成这个双链DNA分子的,核苷酸序列写在这里了
Some of them are changes in the - not the sequence of DNA, not the sequence of nucleotides in the DNA but the chemistry of DNA around that the way that it's packed into a nucleus.
某些改变不是发生在DNA序列上,不是在DNA的核苷酸序列上,而是发生在DNA包装进细胞核的,一系列化学变化中
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