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Ultrastructural localization of several phosphatases with cerium
JM Robinson and MJ Karnovsky
Cerium ions have been used as the capture agent for inorganic phosphate released during the enzymatic hydrolysis of phosphate-containing substrates by a variety of phosphatases. Cerium phosphate reaction product accumulation is proportional to the amount of enzyme present in a cell-free model system. Ultrastructurally, cerium phosphate reaction product appears as a very fine electron-dense precipitate. Cerium appears to be a better capture agent for inorganic phosphate than lead in that reaction product is usually more uniform and more consistently reproducible when cerium is used. Furthermore, nonspecific deposits of reaction product that are commonly encountered in lead-based phosphatase reactions are virtually nonexistent when cerium is the capture agent.
Volume 31,
Issue 10,
pp. 1197-1208,
10/01/1983
Copyright © 1983 by The Histochemical Society
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