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7

Yes, this is possible (and I have done it uncounted number of times) - the method is called "Freeze and squeeze". What you basically do is to run the gel, cut out the band of interest (be careful with the UV light, it causes damage to your DNA and also sunburns, so wear appropriate shielding for your face), dissolve it in a buffer, then freeze it in liquid ...


2

First as you mentioned, which is I think the key thing, is that you need to clarify what DNA sample it is that you are observing in the gel. The best thing to do to ensure that you only have PCR generated DNA samples is that once your PCR is over, treat your DNA mixture with Dpn I enzyme, which cuts methylated DNA, which is essentially cellular DNA as they ...


2

After you check your gel it would behoove you to check primers, preparation, the quality of the XNA itself, then proper electrophoresis levels and other mechanical failures. I would think improper resistance of the electrophoresis wiring would cause your problem.


6

There is one simple reason for that, your agarose gel is most likely too dense. Depending in the type of agarose, I would prepare a 0.5-0.6% gel at maximum. Synbio gives this list for "standard" agarose, which fits pretty good with my experiences. If you use low melting agarose, this table looks a bit different, as the gel matrix is not a dense. The ...



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