染色方法同上。
2、蛋白先浓缩再跑电泳,可以采用TCA沉淀法
If your protein is too dilute, you need to concentrate it before load on gel. Here is a method to concentrate protein before gel:
CHCl3 Precipitation of Proteins
For concentration of proteins from a variety of aqueous solutions.
In a 1.5-ml eppendorf tube take
0.1 ml of sample (or as much as possible)
add
0.4 ml of MeOH
0.1 ml of CHCl3
0.3 ml of H2O (optional)
This should give two phases upon centrifugation at 12,000g for 1 min. Protein should be precipitated at the interface. Pull off the upper phase leaving precipitated protein behind.
Add 0.3 ml of MeOH to give one phase.
Centrifuge at 12,000g for 2 min. Precipitated protein should pellet to bottom of tube.
Note: it is possible to scale up by 1.5x and still fit in a microfuge tube.
祝你成功! 作者: 嗅嗅 时间: 2013-7-30 17:25