Using Glycogen to prec DNA???

[Seanna Annis]

I am trying to purify a PCR fragments, around 600 bp from gel.  I can get 
a decent amount out of the gel, but I lose it during the precipitation 
step.  I want to use this product for direct cycle sequencing, so yeast 
tRNA as an aid to precipitating the DNA was suggested to me to be a bad idea.
I have heard of glycogen used to prec oligonucleotides.  Does anyone know 
of the right concentration of glycogen to use.  And does it interfer with 
sequencing afterwards?  Or does anyone know of another method to get a 
better yield.  
Thanks.  Seanna    (sannis at uoguelph.ca)