Presynaptic ecto- and postsynaptic endo-calcium-adenosine-triphosphatases in synaptosomes: doubts about biochemical interpretation of localization.


Ecto- and endo-Ca-adenosine-triphosphatase (ATPase) activity was identified as electron-dense lead or cerium phosphate precipitate in the rat cortical synaptosomes by transmission electron microscopy and enzyme histochemistry. The formation of the deposit was dependent on the presence of ATP (the substrate), Ca (activator) and levamisole, quercetin or… (More)


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