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Nucleotide polymorphism in microcin V plasmids

机译:Microcin V质粒中的核苷酸多态性

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摘要

DNA sequence polymorphism was determined for the microcin V gene cluster encoded on the microcin V plasmids of 12 natural isolates of Escherichia coli. These microcin V gene clusters are similar in DNA sequence, with only 10 of the 683 bp polymorphic. Further, the levels and patterns of microcin V gene cluster polymorphism differ from those of a chromosomal region, trpORF2, sequenced from each of the host isolates. These contrasting levels and patterns of polymorphism suggest that the microcin V gene cluster has experienced an evolutionary history different from that of the host.
机译:确定了在12种大肠杆菌自然分离株的microcin V质粒上编码的microcin V基因簇的DNA序列多态性。这些microcin V基因簇的DNA序列相似,在683 bp多态性中只有10个。此外,microcin V基因簇多态性的水平和模式与从每个宿主分离物中测序的染色体区域trpORF2的水平和模式不同。这些相反的水平和多态性模式表明,微素V基因簇经历了不同于宿主的进化史。

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