Ultrastructural localization of calcium around the membrane of the surface connected system in the human platelet |
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| Authors: | T. Daimon V. Mizuhira K. Uchida |
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| Affiliation: | (1) Department of Anatomy, School of Medicine, Teikyo University, Kaga, Itabashi-ku, 173 Tokyo, Japan;(2) Department of Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, 113 Tokyo, Japan |
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| Abstract: | ![]()
Summary The localization of calcium in the membrane system of human platelets was determined by ultrahistochemical methods equipped with an electron probe x-ray microanalyzer. After potassium oxalate-glutaraldehyde treatment large amounts of electron opaque precipitates were observed around the membrane of the surface connected system. Electron probe x-ray microanalysis clearly defined that the precipitates were composed of calcium oxalate. The localization of calcium on the membrane of the surface connected system was also confirmed even after treatment of the platelets with potassium antimonate-OsO4. These results support a model which depicts the surface connected membrane system taking part in the store and the transport of calcium.This investigation was supported in part by the Mitsubishi-Foundation, 1976 to Professor V. Mizuhira |
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