Hi, I have a problem with our DNA sample.
Our DNA sample were extracted by Trizol from human blood. We store DNA stock in -80. We need to shift some DNA aliquotes by Fedex to our collaborators. So we took out 200ug of DNA, checked DNA quality, and then stored them in -20 freezer for 1 or 2 weeks and shipped out.
Amazingly, our colloborator lab checked the DNA quality and found most of them were degraded (Gel picture attached). The 260/280 is around ~1.6 and there were DNA obviously stuck in the loading holes.
Any one can give me a clue what could happen to our sample? Any solution to solve this problem?
Really appreciate it!
: )
Our DNA sample were extracted by Trizol from human blood. We store DNA stock in -80. We need to shift some DNA aliquotes by Fedex to our collaborators. So we took out 200ug of DNA, checked DNA quality, and then stored them in -20 freezer for 1 or 2 weeks and shipped out.
Amazingly, our colloborator lab checked the DNA quality and found most of them were degraded (Gel picture attached). The 260/280 is around ~1.6 and there were DNA obviously stuck in the loading holes.
Any one can give me a clue what could happen to our sample? Any solution to solve this problem?
Really appreciate it!
: )
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