Ponceau S staining problem...

Neal Robert Melvin nrmelvin at ucalgary.ca
Thu Nov 30 13:25:55 EST 2000

So what is your Ponceau protocol exactly, Dima??

"The most beautiful thing we can experience is the mysterious. It is the
source of all true art and science"
-- Albert Einstein

Neal Melvin
University of Calgary - Faculty of Medicine
Department of Neuroscience - Neuroscience Research Group (NRG)
Health Sciences Centre
3330 Hospital Drive, NW
Calgary, Alberta, Canada
T2N 4N1

e-mail: nrmelvin at ucalgary.ca
Phone: (403) 220-4490 (lab)
       (403) 220-7035 (office)
       (403) 283-8731 (fax)

On Thu, 30 Nov 2000, Dima Klenchin wrote:

> "Kevin A. Morano" <kevin.a.morano at uth.tmc.edu> wrote:
> :
> :I find that you need to make a very dark Ponceau stain, on the order of
> :a deep cabernet (2-5%??).  It also stains better in 5% acetic acid.  I
> :make the stock and reuse it a bunch.  The sensitivity is low, so you
> :would need at least 5-10 ug total protein on the blot.
> :
> 5-10 ug? My stock made in TCA/sulfosalicilic acid detects 0.1 ug
> without any problem. Surely less sensitive than Coomassie
> but good enough so that in most cases I do not need to run
> a separate gel for total protein staining. Blot -> stain -> scan ->
> destain in pH > 7.5 -> block and do Western.
>         - Dima

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