RNA electrophoresis help

[Michael Sullivan]

I always run RNA gels with ethidium in the gel and buffer and have  
never had a problem. You do need to make sure you're not using too  
much, though, or it might obscure your bands. I use 1 ul of 10 mg/ml  
per 100 mL of gel or buffer.

Mike Sullivan

On Apr 11, 2006, at 6:54 AM, John Frank wrote:

> i recently ran a RNA agarose electrophoresis (in denaturant  
> conditions/formaldehyde) with ethidium bromide in the gel. since  
> not even the markers were visible under the UV, i was wondering if  
> anyone is aware of any possible interactions of the MOPS/ 
> formaldehyde/formamide mixture with the ethidium bromide (i am  
> asking this because after seeing some protocols describing this  
> procedure, i noticed people tend to stain with EtBr afterwards, as  
> opposed to including it in the gel). thanks in advance :)
>
>  - john frank
>
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---
Michael L. Sullivan
Plant Research Molecular Geneticist
US Dairy Forage Research Center
ARS-USDA
1925 Linden Drive West
Madison, WI 53706
(608) 890-0046 (Phone)
(608) 890-0076 (FAX)