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Dyes for RNA in Urea-polyacrylamide gel - (Aug/16/2012 )

Normally I use a 2x loading buffer that contains xylene cyanol and bromophenol blue.
I was wondering if there is a dye that runs slower (higher) than xylene cyanol.

-sihyunie-

everything that is comonly used runs faster than xylene cyanol.

-ascacioc-