I have had success using antibodies beyond their expiration point. If you 
have to get rid of your antibodies because of regulations, you might 
consider donating them to small colleges and universities in your area. 
There is more of a demand for undergraduate research these days at such 
colleges and it is difficult to find the resources to purchase many 
supplies. And the schools would be very appreciative of your help.
Mel

Melville B. Vaughan, Ph. D.
Assistant Professor
Department of Biology
University of Central Oklahoma
Edmond, OK 73034
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