PAP technique
Definition: an unlabeled antibody peroxidase method that reacts both with the rabbit antihorseradish peroxidase antibody and free horseradish peroxidase to form a soluble complex of peroxidase antiperoxidase (PAP); a uniquely sensitive immunohistochemical method that is applicable to paraffin-embedded tissues.
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Examples: glitazone, GI cocktail, etc.

