Date of Award
Doctor of Philosophy (PhD)
A zymogen granule fraction has been isolated from bovine pancreas by differential centrifugation under conditions designed to favor homogeneity at the expense of yield. The fraction has been examined in the electron microscope and found to contain a limited amount of contamination represented by clearly recognizable microsomes and mitochondria. These contaminants could account for a part of the 5% phospholipid and 1% nucleic acid found in the fraction by Schneider partition. The zymogen granule fraction was composed mainly of protein, about 95%. The protein content of the granules has been solubilized by exposure to pH 8, after which a membrane fraction could be isolated by centrifugation. This fraction is assumed to represent the smooth surfaced membranes which bound in situ the zymogen granules.
Greene, Lewis Joel, "Comparison of the Protein Contents of Bovine Zymogen Granules and of Pancreatic Juice" (1962). Student Theses and Dissertations. 577.