RNA gels

[GIETZ at bldghsc.lan1.umanitoba.ca]

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>I am about to do a Northern blot.  I am thinking of running the
>RNA out on 1% formaldehyde gel.  The fragment I want to detect
>is at least 3 kb.  The question is how long should I run the
>gel?  Does anyone know what size RNA correspond to the
>bromophenol blue dye front?

>-fm
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I used to run 1.5% agarose: formaldehyde gels and 
that size of mRNA ran  above the Xylene Cyanol marker.
If you run the gel so that the bromophenol blue is just at the end
the XC will be about mid way in a 1.5% agarose gel.  Hope this 
helps! I never ran 1% agarose:formaldehyde because of the resolution
needed.
________________________________________
Dan Gietz
Department of Human Genetics
University of Manitoba
770 Bannatyne Ave, Rm 250
Winnipeg, Man, Canada
R3E 0W3
GIETZ at BLDGHSC.LAN1.UMANITOBA.CA
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