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THE USE OF BASIC POLYSACCHARIDES IN HISTOCHEMISTRY AND CYTOCHEMISTRY; II. THE DEMONSTRATION OF ACIDIC POLYSACCHARIDES IN TISSUE SECTIONS USING FLUORESCEIN-LABELLED DEACETYLATED CHITIN

SIDNEY P. KENT 1 and E. EDWARD EVANS 1

1 Departments of Pathology and Microbiology, University of Alabama Medical Center, Birmingham 3, Alabama

A method for demonstrating acidic polysaccharides in formalin fixed parafin embedded tissue sections using fluorescein labelled deacetylated chitin is described. Epithelial and connective tissue acidic polysaccharides have been studied in a number of organs. The distribution of acidic polysaccharides as seen with fluorescein-labelled deacetylated chitin is similar to results obtained with alcian blue-periodic acid Schiff and fluorescein-labelled Aspergillus polysaccharide. Previously reported fluorescent staining methods for acidic polysaccharides such as iron-hematoxylin-acridine orange and atabrine as well as fluorescein-labelled deacetylated chitin may prove to be useful adjuncts to the light microscopic methods of demonstrating mucins. Other possible uses of deacetylated chitin, a colorless macro-cation, in histochemistry and cytochemistry are noted.

Submitted on May 20, 1961


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