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单词 selectable marker
例句
原声例句
2017级专外有声

Vectors also incorporate a selectable marker, a gene which allows host cells containing the vector to be selected from amongst those which do not, usually by conferring resistance to a toxin, or enabling their survival under certain growth conditions.

最初的大肠杆菌载体是染色体外的环形质粒,并且相当数量的噬菌体(感染细菌的病毒)也被用在大肠杆菌中。

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