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Ultrastructural demonstration of cytochrome oxidase via cytochrome C in cerebral cortex

SY Al-Ali and N Robinson

A procedure for the ultrastructural cytochemical localization of cytochrome oxidase via cytochrome c in the cerebral cortex is described. Vascular perfusion fixation by formaldehyde and glutaraldehyde of different concentrations and mixtures of the two gave varying results. A mixture of 4% formaldehyde and 0.5% glutaraldehyde gave the best combination of ultrastructural preservation and retention of enzyme activity. Histochemical methods were examined for optimum incubation conditions, based on the oxidative polymerization of 3,3'- diaminobenzidine (DAB) to an osmiophilic product. The reaction product was discretely localized within intercristate and the intermembrane space of mitochondria. The staining pattern was the same in nerve cells and in neuroglia and their processed. The DAB reaction product was also found in mitochondria of the endothelial cells.

Volume 27, Issue 9, pp. 1261-1266, 09/01/1979
Copyright © 1979 by The Histochemical Society


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The Journal of Histochemistry & Cytochemistry is owned, published, and licensed by The Histochemical Society © 1979