[求救] DNA難溶~!
這兩天用TRIzol抽取DNA
然後卡在最後一步的回溶步驟>"<
我把DNA pellet dry的很乾以後(大約放在高處5min)
再回溶在NaOH裡面~並且放置在乾浴器55度C環境約略30min~
但是eppendorf底部的管璧上還殘留一些霧霧的東西
好像是pellet黏在管璧上面了~
我擔心放太久DNA會壞掉
就直接拿去nanodrop測OD
我吸了比較上面的液體~出現了兩個peak>"<
然後又吸了eppendorf底部的管璧(有點稠稠像鼻涕一樣)結果DNA的濃度竟然爆走
測到一個peak但是濃度3000ng/ul... 我稍微看了一下 A260/A280 ratio是1.88
這樣應該是有抽到DNA吧~?
但是濃度有點不正常~之前學姊的濃度都100以內= =@@
我懷疑應該是DNA還在管子底部沒有溶掉才會這樣...
學姊是建議我先將DNA放置在4度C冰箱明天在來繼續回溶
但是我今天都放30min了!覺得有點危險~
請問各位經驗豐富的前輩們我要怎麼改善DNA難溶的問題?
到底我哪一步錯了?(查資料上是寫DNA不能dry太乾)
如果真的不能溶,還是不是可以拿來跑PCR?(因為明天可能要跑PCR)
欸~第一次抽DNA好不容易抽出來了..真的不想敗在回溶這一步阿..
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