glycogen as a carrier
colin at fungus.biochem.ualberta.ca
Mon Mar 25 23:16:49 EST 1996
Ari Kahn wrote:
> I found a protocol for extracting DNA from low melting agarose at
> http://research.nwfsc.noaa.gov/protocols.html In step 6 it asks for 1 ul.
> glycogen as a carrier. What does this do for the pptn of the DNA? Is it
> really necessary or will the pptn work without it?
The 1ul is probably 1ul of a 20mg/ml solution (i.e. 20ug). Glycogen in ethanol
precipitates much like DNA and at this amount forms a visible pellet. The glycogen
precipitate also likely traps the DNA in solution as well. The advantage of
glycogen is that it will not affect subsequent reactions.
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