预电泳

更新时间:2023-12-23 20:00

预电泳,是除去凝胶中没有聚合的单体和双体和聚合引发剂,提高分辨率的一种做法,不加任何物质,一般30-60分钟后再加样电泳。

做法

将聚合好的凝胶安置于电泳槽中,小心拔去梳子,加入电泳缓冲液后低电压10-20V,预电泳20-30min,目的是清除凝胶内的杂质, 疏通凝胶孔径以保证电泳过程中电泳的畅通。

预电泳后依次加入标准品和待分析样品。(加样时间要尽量短,以免样品扩散,可在未加样的孔中加入等量的样品缓冲液避免边缘效应。样品一般在1.0mm厚的胶 加样50-100ug/lane)。

It is really dependent on what gel you are talking about, pro-run for different gels has different purpose. In some case, for instance, SDS PAGE, there may be some residue chemicals in your gel, such as TEMED or ammonium persulfate. Pre-electrophoresis will move those ahead of your samples. Some times, people put some chemicals in the gel, then the pre-run makes the chemical react with something else. At these day, very few people would do pre-electrophoresis to SDS PAGE, but some other electrophoresis may require the pre-run. It really depends.

目的

检测是否通电,同时根据相应的化学实验达到其他的一些检测和预制实验条件。

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