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1 Institute of Dental Research, Departments of Oral Pathology and Oral Biology, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48104, USA
Submandibular glands from male rats were homogenized in 0.34 M sucrose and 0.5 mM ethylenediaminetetraacetic acid in 10 mM HEPES buffer at a pH of 7.4. The extract was centrifuged and filtered through nuclepore filters to prepare a granule-rich fraction. Electron dense zymogen granules constituted approximately 85% of the particles in this fraction which also contained about a third of the total alkaline esterase activity in the gland.
Submitted on October 7, 1974
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