PAP technique

[păp]
n.
  1. An enzymatic antigen detection technique in which an unlabeled antibody peroxidase reacts with both the rabbit antihorseradish peroxidase antibody and with free horseradish peroxidase to form a soluble complex of peroxidase antiperoxidase, or PAP.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.