Furthermore, we demonstrate the advantage of an antigen retrieval step in immunohistochemical labeling of paraffin sections.  Comparison of different stainings and labelings was furthermore performed in serial sections, showing that adjacent to the excretory ducts, the tonsillar tissue was particularly composed of collagen I and fibronectin, while the vessel walls were predominantly α-SMA positive.  Furthermore, these images hold the potential to illustrate inter-species variations. 
THERM