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Biology

Science Experiments

Basic Biology

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Basic Methods in Cellular and Molecular Biology

Making Electrocompetent Bacterial Cells

Description

Bacterial transformation can be done by making electrocompetent cells. In this process, foreign DNA enters bacterial cells after an electrical field creates small pores in the cell wall. The cells that can take up DNA from the environment are called competent cells. In the laboratory, scientists can produce electrocompetent ...

Transcript

细菌转化是一种自然存在的过程,细菌摄入外源DNA, 然后扩增或克隆该DNA。在实验室里,该过程可人工诱导完成,使用高电压的电场在细菌膜上形成小孔,质粒DNA将由此穿过。该方法就是电穿孔法,接下来的视频将讲解它的原理,逐步操作和应用。

在讲细菌的电穿孔之前,很重要的一点是要了解该方法中用到的DNA类型-质粒。质粒是独立于染色体外,小的环状DNA,它作为载体用于携带您的特定DNA序列。

无论该序列是水母的荧光蛋白基因还是植物的一个酶基因,都可通过质粒上的一个被称为多克隆位点的区域插入到质粒。该区域包含可被限制性内切酶或称限制性酶切开的特定序列。可用同样的限制性酶来切开您...

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