Quantitative PCR fine tuning

Robert Passey R.Passey at UNSW.edu.au
Tue Jun 15 20:52:29 EST 1999


I am trying to distinguish between +/- and -/- DNA samples but am having
trouble with a small amount of contaminating +/- DNA in my -/- samples.
As little as 1/20 th contamination is causing problems.

I am using a standard approach where the PCR reaction is still in log
phase but the contaminating product seems to have caught up with the
"main" product by the time I can see bands.

Does anyone have any ideas on how I can either slow down the
contaminating product or speed up the other?


Rob Passey

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