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THE USE OF BASIC POLYSACCHARIDES IN HISTOCHEMISTRY AND CYTOCHEMISTY: III. ALTERED STAINING OF ACIDIC POLYSACCHARIDES IN TISSUE SECTIONS INDUCED BY ASPERGILLUS POLYSACCHARIDE AND DEACETYLATED CHITIN

SIDNEY P. KENT 1 and E. EDWARD EVANS 1

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

The effect of basic polysaccharides on the staining characteristics of acidic polysaccharides in tissue sections of formalin-fixed paraffinembedded material has been studied. Acidic polysaccharides ordinarily do not stain with acidic dyes, but stain well with basic dyes. The complex formed when a basic polysaccharide such as Aspergillus polysaccharide or deacetylated chitin reacts with acidic polysaccharides assumes the staining characteristics of the basic polysaccharide, that is, it stains with acidic dyes. Thus, areas in tissue sections containing acidic polysaccharides can be colored with acidic dyes. Further, the basic polysaccharides were shown to temporarily block staining of acidic polysaccharides by alcian blue and mucicarmine.

Submitted on May 30, 1961


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