质粒Mor174的物理性质，该质粒决定摩根氏变形杆菌174中的细菌素产生。
Physical properties of plasmid Mor174, which determines bacteriocin production in Proteus morganii 174.
作者信息
Williams J A, Krizsanovich-Williams K
出版信息
J Bacteriol. 1978 Jan;133(1):430-2. doi: 10.1128/jb.133.1.430-432.1978.
Abstract
Plasmid Mor174 has a molecular weight of 3.6 X 10(6) and a buoyant density of 1.6994 g/cm3. The covalently closed circular form has a sedimentation coefficient of 22S. These are 30 to 40 plasmid copies per genome equivalent, but growth in chloramphenicol results in amplification of the copy number to 600. In Proteus morganii 174, Mor174 coexists with a cryptic plasmid of molecular weight 15.8 X 10(6) and a buoyant density of 1.7170 g/cm3.
摘要
质粒Mor174的分子量为3.6×10⁶，浮力密度为1.6994 g/cm³。共价闭合环状形式的沉降系数为22S。每个基因组当量有30至40个质粒拷贝，但在氯霉素中生长会导致拷贝数扩增至600。在摩根变形杆菌174中，Mor174与分子量为15.8×10⁶、浮力密度为1.7170 g/cm³的隐蔽质粒共存。
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