[求救] TA cloning一直失敗.....
我用的是invitrogen的TOPO TA Cloning
用Tag P出我的要的片段,約1800b.p
加4ul和1ul的salt solution及1ul的TA vector作用
(22度西 30分鐘)
接著用自己做的competent cell(DH5α)做CaCl2 transformation
結果做了快10盤,不是沒長,就是長的colony抽不出質體
(養的時候感覺菌液就不是很正常,有點稀)
抗生素Ampicillin及Kanamycin都用過了
不知道有沒有人可以給我個建議,麻煩大家了
謝謝~
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