Safe dye for PCR?

Hiranya Roychowdhury hroychow at NMSU.EDU
Fri May 19 10:26:38 EST 1995

On 18 May 1995, Glen Shearer wrote:

> Anyone know of a dye that will not inhibit PCR?
> I would like to add a bit of blue or red (or whatever) to
> the primer soln' so that I can tell which reaction tubes
> I've added primers to so I can keep track of where I am in the
> pipetting process.
> Thanks
> Glen
> [gshearer at]
As far as I know, the standard dyes used in the so-called "blue juice" 
for electrophoresis (bromophenol blue and Xylene cyanol FF) do not bind 
to nucleic acids and are quite inert. However, whether these dyes come in 
the purest of forms, so as not to contain potential inhibitors of 
polymerase rxn., is anybody's guess. One has to be cautious in using 
dyes, though, since the usefulness of these in our applications rests in 
their being charged.

			  Hiranya S. Roychowdhury
   			  Plant Genetic Engineering Lab.
			  Box 3GL, NM State Univ.
			  Las Cruces, NM 88003
			  Phone: (505) 646-5785
			  hroychow at

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