First, do Cas9, put it in the fridge, and want to cut a piece of DNA, then customize a complementary guideRNA. Cas9 is then thawed, bound to guideRNA, and then electrocuted into the cell to cut the wrong gene.<br><br>Bad genes are cut off, how to put good genes? Because cells are naturally automatically patched with damaged DNA, as long as the right gene is sent into the nucleus, there is a chance that the cells will be used to repair Cas9's cut-out and complete gene editing!
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