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Electron Microscopy Sciences

Technical Data Sheets

McManus Pas Method for Glycogen

EMS Catalog #: 26312-Series


10% Buffered Neutral Formalin or Zenker’s


Cut Paraffin, 6 microns.

Staining Procedures:

  1. Deparaffinize and hydrate to distilled water.
  2. Oxidize in Periodic Acid, 0.5% (#26312-03), 5 minutes and rinse in distilled water.
  3. Stain in Coleman’s Feulgen (#26312-01) or Schiff’s Reagent (#26312-1A), 15 minutes and wash in running water to develop the pink color, 10 minutes.
  4. Counterstain in Harris Hematoxylin (#26312-2B) 6 minutes, or Light Green Working Solution (#26312-2A) 5 – 10 seconds. Light Green is better used when delineation of fungi is required. Prepare the working solution by diluting Light Green, 0.2% Solution (#26312-02) 1:5 ratio with distilled water; proceed to step #7, dehydration. Tap water and ammonia decolorize Light Green.
  5. Wash in running water and transfer to Acid Alcohol, 1% (#26312-04), for 3 -10 quick dips. Wash again in distilled water.
  6. Dip in dilute Ammonia Water, 0.3% (#26312-05), to blue the sections and again wash in running water for ten minutes.
  7. Dehydrate in 95% alcohol, absolute alcohol, and clear in xylene, two changes each.
  8. Mount with Permount (#17986-01) or DPX (#13510).

Stain Results:

Nuclei Blue
Fungi Red
Background, when Light Green is used as the counterstain Green, pale


McManus, JFA: Stain Tech.; 23:99 (1948).

AFIP, Manual of Histologic Staining Techniques; L.G. Luna, 3rd edition, New York: McGraw-Hill Publication, c. 1968, p. 160.

Mowry, R.W.: Annals of the New York Academy of Science; 106: 402 (1963).

Product Information

McManus Pas Method for Glycogen