What orange or yellow dye to use in DNA electrophoresis?
John Richard Seavitt
jrseavit at artsci.wustl.edu
Wed Aug 27 12:58:16 EST 1997
On 27 Aug 1997, David N. Levy wrote:
> I cannot remember which yellow or orange dyes can be used to make a
> loading buffer for agarose electrophoresis.
Try Orange G - also called Acid Orange 10 - (Sigma O1625). It runs very
fast (50-100bp) in TBE 1% agarose, and it's quite bright. We use it at
about 0.1% or so (add salt and pepper to taste). Depending on what you're
looking for, there's also Cresol Red (Sigma C7524) that I normally use red
(pH 8.4) but could also be yellow (pH7.0 or so). It runs significantly
higher (1-2kB, I think).
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