Getting out the brown from DNA

Paul E. Ulanch pulanch at
Tue Mar 21 12:57:51 EST 1995

In article <3k9o7b$eqv at> 4700gbera at writes:
>From: 4700gbera at
>Subject: Re: Getting out the brown from DNA
>Date: 16 Mar 1995 16:15:39 GMT

>In article <D5HqxD.K4y at>, rcdana at (Richard Dana) writes:
>>How do I eliminate the brown color from plant DNA preps?
>>I've tried phenol/chloroform and PVP additions to the buffer with no luck.

>Have you tried running it through an agarose gel? Works for humics, when
>extracting DNA from soils and sediments. Adding PVPP helps, too.

>Good Luck-


What I have seen done is to treat the DNA with a little SDS to remove the 
color and then remove the SDS with K-acetate.  Spin down the K-SDS ppt and 
then add EtOH to ppt the DNA.  We used this treatment to isolate DNA from 
Sorghum for making a genomic library and for PCR with very high yields.  

Good Luck!

Paul "Goose" Ulanch

Dept. Biochem/Biophys
Texas A&M University
College Station, TX   77843-2128
(409) 847-9379

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