Strange problem with agarose gel electrophoresis
rhubner at gins.uia.ac.be
Tue Apr 17 13:03:03 EST 2001
> DNA migrates from "Black" to "Red" ... I have no idea why! Somebody long
> long time ago decided those colors for everybody else, and since then
> nucleic acids have been migrating from the "Black" electrode to the "Red"
> one -- provided a potential difference exists in between.
... and provided that the "Red" on the gel box is plugged into the "Red"
connection on the power source ;^)
> If this does not solve the problem, I may suggest preparing the TBE stock
> (5x or 10x, whatever you have) fresh. I don't use TBE for routine DNA
> gels for its notoreity in going "bad" (precipitating) within a few weeks.
... for 20x TBE I "autoclave" that (to dissolve tiniest crystals) and
it's fine for warmer period of year... However, when temperature shifts
brutally (Univ. heating down over 'cold' WE) still gives ppt.
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