[求救] plasmid用insert primer P出vector??
前情提要:
我用的vector是thermo的pJET1.2,大小2974 bp
insert大小約4.2 kb,是用HiFI系列polymerase出來的blunt end產物,切膠純化
按protocol ligate後使用自製的competent轉型,amp篩
隔天長出約100個colonies
挑8個colonies抽mini,做RE digestion
沒切出預期的片段,只有Vector,沒有insert,或insert大小不對
但因為不信邪...
拿抽好的plasmid,用insert的primers跑PCR跑膠
結果八個都有跑出Band!!但都是vector的大小 (3000左右)!!
不太明白為什麼會這樣...
是汙染的意思嗎?
抱歉是Cloning新手,有爬文也和其他人討論過
之後會用別梯的PCR產物repeat實驗
但在這之前很想知道這次的結果代表哪個環節出了問題
謝謝!!
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※ 編輯: kaofei (118.165.158.16), 08/17/2016 21:16:36
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