[求救] lysis buffer是否要含imidazole
Lysis buffer: 50mM NaH2PO4,300mM NaCl,10mM imidazole和PMSF
Wash buffer: 50mM NaH2PO4,300mM NaCl,20mM imidazole
Binding buffer: 50mM NaH2PO4,300mM NaCl,250mM imidazole
菌體:E. coli
首先菌養完離心後用20ml Lysis buffer回溶,在超音破菌後,離心取上清液,接著與
Ni-NTA樹脂2ml混合,在冰上搖晃2hr,倒入滴管收集流出液,之後再用wash清洗,
elution洗出目標蛋白,western後結果,蛋白都在流出液和wash的部分,所以有以下問題
想請教各位
問題:
1. Lysis buffer中imidazole功用是?那會影響蛋白與樹脂的結合嗎?
2.如何提高蛋白和樹脂的結合能力,才不會蛋白都在流出液和wash的部分
麻煩各位給小弟解答,謝謝
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