DNA degradation

[Tung Tran Duc Tuan]

In article <6204uj$a67$1 at news.utu.fi>, mirher at utu.fi says...
>
>Hello!
>Does anyone know how to inhibit DNase activity? I keep genomic DNA 
>samples at 4 C, and after 2 weeks the DNA seemes to degrade so that
>it can't be used for PCR etc...has anyone got same kind of problems,
>i would really need some ideas here! thanks a lot,
>
>mirkka

Hello,
I have to suggestions:

You have to heat your genomic-DNA at 65 C for 10 min. to denature the 
DNase after the final Ethanol precipitation with sodium acetate and chill on 
ice for 2 min. before the storage.

The genomic-DNA can be precipited after several days in the fridget, you have 
to heat them up at 65 C for 5 min., then chills on ice for 2 min. before the 
PCR-test.

Amically your