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来自维基百科,自由的百科全书
DH5α(可简写作DH5a)是一种生物实验室常用的高效率[1]感受态细胞,由经过改造的大肠杆菌(E. coli)制得。DH5a含有三个突变:recA1、endA1、lacZM15。recA1突变使得多肽recA160位的甘氨酸(Gly)替换为天冬氨酸(Asp),使重组酶失活,封锁了同源重组[2]。endA1突变使得一种细胞内内切酶失活,阻止了进入细胞的质体解体。lacZM15则使得研究者可以使用蓝白斑筛选法筛选转化后的DH5a[3]。 DH5α中的DH是指该感受态的发明人道格拉斯·哈纳汉(Douglas Hanahan)[3]。
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