大家好~
小妹在實驗上遇到一點困難,想請問一下大家><
目前因為實驗上的需求想純化小片段的蛋白
首先將蛋白依domain切成四個部分construct到pET-22b(+) Vector
定序結果都ok
但是利用BL21-CodonPlus Competent Cell表現的結果
只有一段可以表現在上清液,其他三段則是都不表現
目前試過的條件有25度及37度
IPTG的濃度試過0.5mM及1mM
由於是第一次純化,也不是很確定可以再修改那些條件
想請問大家是否有其他的建議
感激不盡!!!
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※ 發信站: 批踢踢實業坊(ptt.cc)
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