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. 1979 Sep 1;82(3):697–707. doi: 10.1083/jcb.82.3.697

Immunocytochemical localization of amylase and chymotrypsinogen in the exocrine pancreatic cell with special attention to the Golgi complex

PMCID: PMC2110482  PMID: 511932

Abstract

Affinity-purified, monospecific rabbit antibodies against rat pancreatic alpha-amylase and bovine pancreatic alpha-chymotrypsinogen were used for immunoferritin observations of ultrathin frozen sections of mildly fixed exocrine pancreatic tissue from secretion-stimulated (pilocarpine) rats and from overnight-fasted rats and guinea pigs. The labeling patterns for both antibodies were qualitatively alike: Labeling occurred in (a) the cisternae of the rough endoplasmic reticulum (RER) including the perinuclear cisterna, in (b) the peripheral area between the RER and cis-Golgi face, and (c) all Golgi cisternae, condensing vacuoles, and secretory granules. Labeling of cytoplasmic matrix was negligible. Structures that appeared to correspond to rigid lamellae were unlabeled. Differences in labeling intensities indicated that concentration of the zymogens starts at the boundary of the RER and cis-side of the Golgi complex. These data support the view that the Golgi cisternae are involved in protein processing in both stimulated and unstimulated cells and that Golgi cisternae and condensing vacuoles constitute a functional unit.

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Selected References

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