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  • Title: Mitochondrial calcium and cellular electrolytes in brain cortex frozen in situ: electron probe analysis.
    Author: Somlyo AP, Urbanics R, Vadasz G, Kovach AG, Somlyo AV.
    Journal: Biochem Biophys Res Commun; 1985 Nov 15; 132(3):1071-8. PubMed ID: 4074348.
    Abstract:
    Mitochondrial calcium in rat brain cortex frozen in situ and measured with electron probe X-ray microanalysis was 1.5 mmol Ca/kg dry weight. Cellular, extramitochondrial Ca was 6.4mmol/kg dry weight and cytoplasmic Na+ was 73mM. These results do not support the role of mitochondria regulating cytoplasmic Ca2+, but are compatible with the regulation of mitochondrial enzymes by matrix free Ca2+.
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