Activation of an internal gene requires generation of new sequences. 內源基因的激活需要新序列的產(chǎn)生。
Only about one out of a million cells will correctly incorporate a foreign gene using the most common versions of this technique. 應用這種最常規的技術(shù),僅有百萬(wàn)分之一的細胞可以正確加人外源基因。