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  • Title: Ultracytochemical characteristic of ouabain-sensitive, potassium-dependent p-nitrophenylphosphatase (Na(+)-K(+)-ATPase) of rat myocardium.
    Author: Kiselyova AP, Zinchuk VS.
    Journal: Acta Histochem; 1990; 88(1):1-9. PubMed ID: 2162617.
    Abstract:
    The ultracytochemical localization of ouabain-sensitive, potassium-dependent p-nitrophenylphosphatase within a rat heart has been studied. Our cytochemical procedure for the detection of enzyme activity is based on an incubation medium consisting of tris-maleate buffer, p-nitrophenylphosphate (p-NPP) as a substrate, lead nitrate as a trapping agent, MgCl2, KCl, levamisole, final pH = 7.3. The physiological pH of the incubation medium highly increases the authenticity of the enzymatic reaction and is the main advantage of the technique. Postincubation processing of specimens by 0.1 mol/l tris-maleate buffer pH = 6.0 confirms the specificity of the reaction and removes nonspecific precipitation.
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