Using Biotin in ELISA's

TA. Omiecinski bijgh at
Mon Feb 19 09:28:40 EST 1996

Karl Eisele (cbiei01 at wrote:
: Hi,

: I'd say we need a bit more information on your setup to help you. 
: However, one mistake which is frequently made is blocking your ELISA 
: with dried milk which itself contains biotin (!!) --> high background (or 
: unspecific binding).

I read that somewhere and have been using BSA or gelatin as a blocking 
agent.  The problem I'm having isn't a high background as such (empty 
wells give negative results) but false positive binding to any protein I 
coat the plate with.

Thanks for your interest!


Jared Head     at the Department of Biochemistry, University of Bristol

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