removal of rRNA

Michael Gillings gillinm at
Fri Feb 16 00:06:40 EST 1996

Neil at has the question of how to selectively remove rRNA 
from total nucleic acid preps

One method worth trying:

Add one quarter volume of 10 M lithium chloride (sterile and .22 um 
filtered) to the RNA prep.  Hold overnight at 4 C.  Centrifuge at 12,000 
g for 20 min at 4 C. The LiCl pelleted material should contain most of 
the rRNA.  Precipitate the remaining RNA from the supermnatant with 2.5 
volumes of cold ethanol.

You may lose mRNA using this method so check how your Northerns go in a 
trial run. 


Dr Michael Gillings
Senior Research Scientist
Biological and Chemical Research Institute
PMB 10, Post Office Rydalmere
NSW 2116

Ph   61-2-843-5709
Fax  61-2-630-4475

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