[求救] ligation求救
我的insert約2.7kb, vector 5.9kb doule digest overnight
vector use gel clean(因為切兩刀後會掉下約500bp)
ligation 比例 insert:vector=3:1 , 6:1 於室溫下反應45min~1hr
transformation 加10ul ligation solution到complete cell(市售的)
->冰浴 -> heat shock 90sec -> 冰浴 -> 加LB(不含Amp)培養 ->塗盤
隔天收盤時,每盤約只長不到10顆 而且都不是我要的
有把ligation solution拿去跑膠 看起來都沒有band
感覺是沒有接上去的樣子 = =
有換過另一個vector 兩個切位就在旁邊酵素切完, clean , CIP
收盤時菌落是比較多了 但看起來都是原本的質體 insert 沒有接上去阿 = =
是因為inssert 片段比較長 所以比較不好接嗎?
想請問 有建議的ligation方法(時間.溫度....)嗎??
我已經前前後做了快半年了(中間有在改東西) 做到都快發瘋了 嗚嗚
感謝大家!!
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