RNA sizing against DNA markers

[D. KIM]

In article <4vq45a$276 at mserv1.dl.ac.uk> GILLIAN NI BHARLO BOTANY PG <NIBHARLO at acadamh.ucd.ie> writes:
>Hello everybody!
>A question on behalf of a colleague. She has some photos of old RNA 
>gels (agarose) with DNA markers on. What allowances does she make for 
>sizing the RNA against these markers? Please dont suggest she runs 
>them again, shes writing up and not in a position to do so.
>Thanks if you can help
>Gill


What method was used to denature the RNA?  I believe glyoxal/DMSO gels 
will give good correlation between size and migration of RNA and DNA 
denatured markers.  I do not know if the same is true of formaldehyde 
gels.  If the samples were denatured with glyoxal, she can use the 
markers "as is".

Daniel Kim
dkim at nmsu.edu

p.s. I believe this was discussed several years ago in BioTechniques.  
Try searching their archives.  DK