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删除 pcnB 基因可降低 ColE1 家族质粒拷贝数,影响耐药大肠杆菌的抗生 ...
质粒作为抗生素耐药基因的 “搬运工”,在细菌间水平转移,促使耐药性不断扩散。其中,ColE1 家族质粒携带多种耐药基因,其拷贝数(PCN)对细菌耐药水平影响重大。高拷贝数意味着更多的耐药基因,细菌耐药性也就更强。此前虽有研究关注质粒拷贝数调控 ...
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