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. 1976 Feb 16;46(2):139-46.
doi: 10.1007/BF02462738.

Glycoproteins in membranes of secretory granules of the anterior pituitary gland

J B Warchol, D C Herbert, E G Rennels

Glycoproteins in membranes of secretory granules of the anterior pituitary gland

J B Warchol et al. Histochemistry. .

Abstract

Rat anterior pituitary glands were examined by electron microscopy after staining with five different histochemical stains. Histochemical reactions were observed in the cell coat, cell membrane and the membrane surrounding the secretory granules in all anterior pituitary cells following staining with phosphotungstic acid (PTA), chromic acid and PTA, the periodic acid-thiosemicarbazide-silver protein method (PA-TSC-SP) of Thiéry, ruthenium red and concanavalin A. The staining was abolished when the sections were preincubated with pronase, neuraminidase or trypsin and subsequently exposed to PTA, chromic acid and PTA or PA-TSC-SP. The possible functional role of the glycoproteins present in the membrane surrounding the secretory granules is considered.

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