Retroviruses, for example, can only insert - can only transduce and express their DNA in cells that are dividing.
就以逆转录病毒为例,它们只能在分裂阶段的细胞里,转导并表达自己的基因
So if it's not a cell that's going through division you can't use a retrovirus to express the protein.
如果细胞不在分裂阶段,你就不能用逆转录病毒来表达某个蛋白
They integrate their DNA into the host genome and you might not want to make that kind of a change in the cell.
而且也许你也并不想让逆转录病毒基因,整合进宿主的基因组
This is a life cycle of a particular class of viruses called retroviruses.
这里是称为逆转录病毒的一种特殊病毒的,生命周期
They, in some cases, they integrate their DNA into the host chromosome, that's what retroviruses do and they make viral proteins.
有些情况下,病毒DNA会整合进宿主的染色体中,逆转录病毒就是这样做的,它们还制造病毒蛋白
HIV is a member of the family of viruses called retroviruses, and retroviruses all use RNA as their genetic material.
IV是一种逆转录病毒,所有逆转录病毒均以RNA作为遗传物质
You know about retroviruses, the most famous and important one at this time is HIV, which is a retrovirus.
你们应该听过逆转录病毒吧,现下最为知名而重要的 HIV,就是一种逆转录病毒
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