Western blot problem
Posted 15 February 2005 - 08:46 AM
It didn't show any band after western blot.
You guys think that 8M urea inhibited antibody reaction in western blot?
I don;t know it... please help me.
Posted 15 February 2005 - 08:56 AM
Posted 15 February 2005 - 09:06 AM
littlecell, on Feb 15 2005, 09:56 AM, said:
Then should i dialyzed sample first, then do western blot?
My protein was insoluble, that's why i used.
What should i do the next?
Posted 16 February 2005 - 03:28 AM
I don't think that some Ál of 8M Urea/well of PAgel will denature your 1st and 2nd Ab... the urea should be almost completely removed or dilluted to infinity at the point where an Ab "meets" the membrane....
think of all those volumes used (transfer-buffer, then blocking buffer, then 1st Ab.....)
you should check if your samples hold proteins at all by coomassie/silver stain first, and then check your membrane after transfer by ponceau-staining.
and no offense meant: sometimes it shows that the membrane was on the wrong side of the PAgel while western-transfer....
Posted 17 March 2005 - 08:49 PM
Posted 18 March 2005 - 01:54 AM
Of course you're right, but in denatureing SDS-PAGE this isn't an issue, since all proteins get denaturated and epitopes detected by denatureing SDS-PAGE and western blotting are primary epitopes solely anyway, since secondary and higher structures are dissolved...