PEG Absorbance

*Hi all,
*
*Does anyone knows what is the PEG (Polyethilene glycol) absorbance ratios?
I recently used PEG to make a PCR purification and the
spectrophotometry tells me that it** was ok (120 ng/ul . Good 260 measure
and low 280,230 and 320) but **when I loaded the PCR purification into a 1%
Agarose gel it shows me nothing.
I suspect PEG contamination into my sample.

Thanks for any help*

In article <[Only registered users see links. ].net >, "Felipe Leprevost" <[Only registered users see links. ]> wrote:

PEG itself does not absorb ar 260-280. Any absorbance would have
to come from impurities, which are probably variable. What did you
use PEG for? What's 260/280 ratio?

DK

Historians believe that in newspost <IK4Wh.853$[Only registered users see links. ]> on
Fri, 20 Apr 2007, DK <[Only registered users see links. ]> penned the following
literary masterpiece:

PEG + NaCl is quite a common method for inexpensively cleaning up a PCR
reaction. It will ppt. the amplified DNA whilst leaving behind primers,
dNTPs and DNA polymerase.

Possibly published by Wayne Barnes in his Klentaq fidelity paper in I
think Gene around 1991-1993. Makes me feel old writing that as I
remember reading it then.

Duncan
--
I love deadlines. I especially like the whooshing noise they make as
they go flying by.

Duncan Clark
GeneSys Ltd.

In article <[Only registered users see links. ].com>, Duncan Clark <[Only registered users see links. ].uk> wrote:

Hey, I used to clean up large alkaline lysis plasmid preps with
PEG for transfections in 1987............... Ouch.

DK