dirty RNA prep

[Ulf Andersson]

Hi,
instead of using expensive columns and kits you can precipitate the bile
salts (and probably also glycogen) with 1 vol. of 8M LiCl (store -20°C for
a couple of hours and spin 15 min. top speed in a microfuge) or with 3
vol. 4M Na Ac, ph7 (store on ice for a couple of hours and spin 15 min.
top speed in a microfuge).
I have never used the Na Ac procedure but I know that LiCl really improves
your liver RNA...

/Ulf.


In article <5rl3mm$1d44 at r02n01.cac.psu.edu>, cfb7 at psu.edu wrote:

> Hi,
> I purified total RNA from mouse liver and spleen and while the spleen
> RNA is clean and usable, the liver RNA is filthy.  It has a greenish
> -yellow tint and a 260/280 ratio of 1.02.  My suspicion is that the
> contaminating stuff is bile salts, but I don't know how to remove them.
>  Phenol:chloroform extraction didn't help.  Any hints?  Thanks,
> Christie
> 
> Christie Blackman      cfb7 at psu.edu
> Department of Biochemistry
>    and Molecular Biology
> Penn State University
> University Park, PA
> 
> "There are alot of bastards in the world, the number increasing the 
> further one gets from Missoula, Montana."  
>            Norman McLean, A River Runs Through It