RNA storage in guanidinium isothiocyanate

Andre Hamel hamel at cc.umanitoba.ca
Sat Nov 19 20:32:06 EST 1994

RNA stores perfectly well frozen in GITC ... -70*C so much the better.

Even crude lyates (tissues, cells homogenized in GITC) store well frozen @
-70*C ... several months.

I recommend extracting with phenol, CHCl3, etc once thawed ... on ice of 


  Andre Hamel                      email: hamel at cc.umanitoba.ca
  Manitoba Government                         tel: 204/945-7630
  Department of Agriculture                   FAX: 204/945-8062
  Veterinary Services Branch          
  Winnipeg, Manitoba, CANADA 

In <Pine.SGI.3.91.941119193133.5646A-100000 at helix.nih.gov> rhewitt at HELIX.NIH.GOV (Robert Hewitt) writes:

>Dear Internetter,

>Can anyone tell me whether RNA is stable at -70 degrees C in 
>guanidinium isothiocyanate solution?  

>I have been using the Stratagene micro RNA preparation kit for preparation
>of total RNA.  This includes a denaturing solution containing guanidinium,
>which is applied to the cells in the first step of the protocol.  For
>convenience, it would be helpful if the cell lysate + guanidinium could be
>stored at -70 after the first step. Any advice would be much appreciated.

>Robert Hewitt

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