[求救] Supercoil form plasmid 電泳問題
大家好 ,最近接了一個案子
要跑supercoil DNA plasmid電泳
分成 直接
loading plasmid (supercoil form)
enzyme digest成為open-circular form
enzyme digest成linear form
根據datasheet
SC跑最下面 ,OC較高 ,LC略比OC高
可是我跑出來 ,SC,OC沒問題
但LC卻比SC還低
另外包括marker,band都不清楚
但很粗 ,所以應該不是loading量問題
可能在於染色 ,
是用EtBr代染劑染的
聽說用不同染劑可能會因此跑出不同大小??
匯整問道為:
1. LC位置過低可能造成因素
2. band不明顯是染劑問題?(如果跑膠時間很長會有影響嗎)
3. 不同染劑可能造成位置差異?
4. supercoil marker位置與1 kb marker
完全不同 ,該相信誰
謝謝各位
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