大肠杆菌的金属离子含量与细胞年龄的关系
Metal ion content of Escherichia coli versus cell age.
作者信息
Kung F C, Raymond J, Glaser D A
出版信息
J Bacteriol. 1976 Jun;126(3):1089-95. doi: 10.1128/jb.126.3.1089-1095.1976.
Abstract
The potassium, calcium, magnesium, and zinc ion content of cells in exponential and synchronously growing cultures of Escherichia coli B/r was determined with an X-ray fluorescence spectrometer and an atomic absorption spectrophotometer. Cellular potassium, calcium, and magnesium content increased smoothly during the cell cycle, but cellular zinc showed a steplike increase about 10 to 15 min after cell division in a culture having a doubling time of 47 min. The possible role of cellular zinc in the control of cell division is discussed.
摘要
用X射线荧光光谱仪和原子吸收分光光度计测定了大肠杆菌B/r指数生长和同步生长培养物中细胞的钾、钙、镁和锌离子含量。细胞内钾、钙和镁的含量在细胞周期中平稳增加，但在倍增时间为47分钟的培养物中，细胞内锌在细胞分裂后约10至15分钟呈现阶梯状增加。文中讨论了细胞内锌在控制细胞分裂中可能发挥的作用。
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