Trouble finding DNA concentration on Spec..

Wayne Duck wayne-duck at
Wed Feb 14 18:50:58 EST 1996

William B. Melchior, Jr. wrote:
> Charles A Miller wrote:
> >         I am am having trouble determining DNA concentrations on a
> > spectrophotometer. When I measure the UV absorbance, I consistantly get
> > 0 or even a negative number when it is obvious through gel
> > elctrophoresis of the supercoiled plasmid that there is plently of DNA.

On occasion I have seen this problem in DNA samples that were not 
completely dry.  I don't "know", but I had always assumed ethanol 
was causing the problem.

Wayne Duck
Dept. of Physiology and Biophysics

guest2 at "War Eagle"

"Houston, Tranquility base here, The Eagle has landed."

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