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- W2038973325 abstract "A protocol for isolating milligram quantities of highly purified zymogen granule membranes from calf pancreas was developed. The method provides a fivefold enriched zymogen granule fraction that is virtually free from major isodense contaminants, such as mitochondria and erythrocytes. Isolated granules are osmotically stable in isosmotic KCl buffers with half-lives between 90 and 120 min. They display specific ion permeabilities that can be demonstrated using ionophore probes to override intrinsic control mechanisms. A Cl- conductance, a Cl-/anion exchanger, and a K+ conductance are found in the zymogen granule membrane, as previously reported for rat pancreatic, rat parotid zymogen granules, and rabbit pepsinogen granules. Lysis of calf pancreatic secretory granules in hypotonic buffers and subsequent isolation of pure zymogen granule membranes yield about 5-10 mg membrane protein from approximately 1000 ml pancreas homogenate. The purified zymogen granule membranes are a putative candidate for the rapid identification and purification of epithelial Cl- channels and regulatory proteins, since they contain fewer proteins than plasma membranes." @default.
- W2038973325 created "2016-06-24" @default.
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- W2038973325 date "1992-04-01" @default.
- W2038973325 modified "2023-09-27" @default.
- W2038973325 title "Large-scale purification of calf pancreatic zymogen granule membranes" @default.
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- W2038973325 doi "https://doi.org/10.1016/0003-2697(92)90205-l" @default.
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