Dear Francoise, I did not know that you could remove the indole coloured
precipitate from NBT-BCIP stained membranes. How did you find out about
this? It sounds good for my NBT-BCIP stained western blots!
On 23 Jan 2001 francoise.martz at metla.fi wrote:
> Non-radioactive northern-blot, colorimetric NBT-BCIP detection:
> To reprobe a northern membrane (nylon N+) using the DIG and the
> colorimetric system, I am removing the precipitate by incubation in DMF,
> 50oC, but there are 2 problems:
> - strong staining is not removed,
> - I have the feeling that RNA are also removed (they are fixed by backing
> 80oC, 2h).
> So is there any other possible treatment to remove the color precipitate,
> that keeps the RNA on the membrane...?
> Thanks for your help.
> Françoise Martz
> The Finnish Forest Research Institute
> Rovaniemi Research Station
> P.O. Box 16
> 96301 Rovaniemi, Finland
> Tel: +358 16 336 4215 - Fax: +358 16 336 4640