Western blot - Stripping and Reprobing - (Mar/04/2005 )

Hello,

I had a quick question about stripping and reprobing a PVDF membrane. I'm trying to figure out if anyone has had good experience with reprobing a membrane multiple times (ie: 3+). Also has anyone had luck reprobing the same membrane for a different protein? Not just looking at phospho versus non-phospho of the same protein.

Thanks

-C. Wong

The Best method for stripping (period) is using diaminobenzadine. It is reported by John Reeds lab in the following journal.

Detection of multiple antigens on western blots.
Anal Biochem. 1996 May 1;236(2):221-8.

You cannot reprobe the blot using the same antibody using this method (at least in my hands).

hi
i usually use 0.2Mglycine pH 2.5 and tween 0.05% (80° for 20'), rinse with TBS or PBS and the membrane is ready to use.

Fred

Same protocole as Fred33! Confirme the membrane is ready to use!

If the different proteins are very different in size, and you are familiar with the antibodies (i.e. tried them individually on beforehand), I wouldn't bother stripping. Just use one at them time...
I use ReBlot from Chemicon and it works fine (the composition is obviously a secret...)

good luck

i use another buffer, 50mM tris pH6.8, 100mM b-mercapto and 2% SDS. Leave on for 30 mins at 50C and then wash off twice with TBS-T

I've probed the same blots for different antibodies, tubulin after using a phospho antibody. No problems.

I use the same protocol as patirl. Smells bad but works good.
Cheers

Hi
I figured out that you can strip the membrane with whatever protocol you want, and you can probe again for the same or different protein, it works fine