One of the most frequently used chemical methods in histology is P.A.S. staining. The P.A.S. staining is based on the oxidation reaction with the presence of periodic acid and Schiff’s reagent. Periodic acid makes the molecules containing glycol groups create aldehydes affected by Schiff’s reagent that stains them violet (magenta). This method is most commonly used in liver and muscle cells testing. Specific stains are created by applying P.A.S. method on unsubstituted polysaccharides, mucoproteins and glycoproteins, glycolipids and phospholipids. Combined with Alcian Blue, it can detect acid mucosubstances (glycosaminoglycans).
P.A.S. kit
Five-reagent Periodic Acid-Schiff kit for staining aldehydes, muccopolysaccharides, mucoproteins and lymphocytes according to Hotchkiss-McManus. P.A.S. staining may also be used for the demonstration of fungal organisms in tissue sections.
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| Stain Category | Carbohydrates |
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