Hello,
    My second question- our lab studies salivary glands.  We do a lot of immunohistochemistry- and we would like to do more.  I am having trouble getting positive beta-galactosidase staining in the salivary glands- however I do get positive staining in other tissues from the same animals.  Is this a fixation problem or should I use a different type of anitgen retrieval on salivary glands?  Any suggestions would be greatly appreciated.
  Tara

 
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