蛋白质纯化方法
蛋白质纯化方法,镍柱Protocol
蛋白质纯化方法(镍柱)
柱前操作
1.IPTG诱导后,收菌,8000rpm/min(r/m)离心10min;
2.用Binding Buffer(BB)溶解(每100ml原菌液加BB 20ml),超声裂解30min(工作:5s,停止:5s),1500r/m离心10min,去除杂质;
3.取上清,12000r/m离心20min,得包涵体;
4.用含2M尿素的BB洗包涵体,12000r/m离心20min,(上清做电泳);
5.用含6M尿素的BB溶解包涵体,12000r/m离心20min,(上清做电泳);
6.对照电泳结果,将上清或包涵体溶解液上柱;
平衡柱子(柱体积:V)
7. 3V(3倍柱体积)ddH2O(洗乙醇);
8. 5V Charge Buffer(CB);
9. 3V BB;
柱层析
10.上样;
11. 10V Washing Buffer(WB);
12. 6V Elute Buffer(EB);
13.分管收集,每管1~2ml.
各种缓冲液配方
1. 8×BB: 4M NaCl, 160mM Tris-HCl, 40mM imidazole(咪唑),pH=7.9
1000ml
NaCl: 58.44×4=233.76g
Tris-HCl: 121.14×160×10-3=19.3824g
Imidazole: 68.08×40×10-3=2.7232g
2. 8×CB: 400mM NiSO4
1000ml
NiSO4: 262.8×400×10-3=105.12g
3. 8×WB: 4M NaCl, 160mM Tris-HCl, 480mM imidazole, pH=7.9
1000ml
NaCl: 233.76g, Tris-HCl:19.3824g, Imidazole: 32.6784g
4. 4×EB: 2M NaCl, 80mM Tris-HCl, 4M imidazole, pH=7.9
1000ml
NaCl: 118.688g, Tris-HCl:9.6912g, Imidazole: 272.32g
5. 6M 尿素
1000ml
尿素:60.06×6=360.36g
[ Last edited by silicare on 2011-10-14 at 09:17 ]
柱前操作
1.IPTG诱导后,收菌,8000rpm/min(r/m)离心10min;
2.用Binding Buffer(BB)溶解(每100ml原菌液加BB 20ml),超声裂解30min(工作:5s,停止:5s),1500r/m离心10min,去除杂质;
3.取上清,12000r/m离心20min,得包涵体;
4.用含2M尿素的BB洗包涵体,12000r/m离心20min,(上清做电泳);
5.用含6M尿素的BB溶解包涵体,12000r/m离心20min,(上清做电泳);
6.对照电泳结果,将上清或包涵体溶解液上柱;
平衡柱子(柱体积:V)
7. 3V(3倍柱体积)ddH2O(洗乙醇);
8. 5V Charge Buffer(CB);
9. 3V BB;
柱层析
10.上样;
11. 10V Washing Buffer(WB);
12. 6V Elute Buffer(EB);
13.分管收集,每管1~2ml,
顶一下,感谢分享!
顶一下,感谢分享!