Sheep IgG's with Email

Chris Hughes cchughes at
Thu Jun 27 21:22:08 EST 1996

In article <-2406961545060001 at>,
(room 103) wrote:

> Hi folks,
> I'm having big problems using antibodies raised in sheep....
> when I develop Western blots of whole human cell extracts
> using the ECL system the background is so high even at dilutions of 5000
> that any specific signal is lost.However this is not a problem when
> testing the antibodies on Westerns against the fusion protein....

Sounds like you need to pre-absorb your ab against human cell lysates
(non-transfected) to get rid of cross-reacting abs.  In theory the only
abs you should get back capable of binding to anything would be those
specific to the His tag.  I should say that I've never actually tried
this!  Maybe worth a try though -- better than the drain.


Chris Hughes

Dr. Chris C.W. Hughes                   
Dept. Mol. Biol. & Biochem.
Biol. Sci. II
Univ. California, Irvine                 cchughes at  
Irvine CA 92717                          ph (714)  824 8771

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