Help, decreasing temp. during long sequencing runs!
crasmussen at anat.med.ualberta.ca
Tue Jun 6 19:59:05 EST 1995
In article <3r2cqg$no0 at falcon.ccs.uwo.ca>, ovanham at julian.uwo.ca (o.
> I've been finding that when I run my sequencing gel for relatively long
> runs, the temperature (and current) steadily drops. I've heard that this
> is due to a pH change in the buffer (TBE). Is this true? If so, how do I
> remedy the problem. The situation is complicated by the fact that the
> buffer is hot (P32) from the samples.
> Thanks in advance for any suggestions.
You should run sequencing gels at constant power (watts) not at contant
current or voltage. This will ensure a steady temperature during the
run. If your power supply cannot be set to run constant power then all
you can do is put a thermometer on the gel plate and tweak the voltage
every now and then as you see the temp drop.
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