Dog liver is only a good control for copper if it contains excessive 
quantities of copper, an abnormal situation that is not very common. So if 
you just were to stain regular dog liver for copper you will not see any.

Cindy Farman

-----Original Message-----
From:	John Shaw [SMTP:jolesh@hotmail.com]
Sent:	Thursday, April 08, 1999 2:54 PM
To:	HistoNet@Pathology.swmed.edu
Subject:	Mast Cells and Copper Controls

I have found that your local vet can be a good source of control
tissues.  For copper, dog liver is an excellent control.  For mast
cells, a cross-section of rat ear has wonderful mast cells lined-up
along either side of the cartilage.


_______________________________________________________________
Get Free Email and Do More On The Web. Visit http://www.msn.com