No it is not the rule. The thing is that sections covered with paraffin will be isolated from the air and the epitopes will not be readily oxidized. You can also keep them in a container immersed in mineral oil. If you do either, you do not need to keep them at low temperature.
René J.

--- On Fri, 9/12/08, Margaryan, Naira  wrote:

From: Margaryan, Naira 
Subject: [Histonet] Unstained slide storage
To: histonet@lists.utsouthwestern.edu
Date: Friday, September 12, 2008, 2:59 PM

Hi Aprill,

Why do you keep paraffin-embedded slides in refrigerator? Is it the
rule? 

Naira 

      
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