Thank you  to everyone who answered to my autoflourescence quenching
question.
I have tried  already some of the solutions but I think it is lipofucin (how
do you pronounce this?), as Shelly Sheridan suggested. It is age related and
I don't get it on younger animals. Will have to work on this.
Thanks again,

Lilith
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Lilith Ohannessian-Barry                               
National Research Council                          
Institute of Biological Sciences                  
CANADA
Tel;613-993-6460
Fax;613-941-4475
e-mail; lilith.barry@nrc.ca