[Localization of Na+,K+-ATPase activity in the cardiac myocytes of white rats at the ultrastructural level].
The localization of Na+,K+-ATPase in cardiomyocytes of white rats at the ultrastructural level and the dependence of enzyme activeness on electronic density of structures, were studied. Na+,K+-ATPase activity was revealed in plasmalemma, Z-membranes and in nuclei. The enzyme activity is distributed discretely both within the tissue and within separate cells. It is, probably, due to the heterogeneity of structural-functional condition of cells and their ultrastructures as revealed by means of electronic microscopy in terms of their different electronic density. The maximal Na+,K+-ATPase activeness was revealed at the average electronic density of structures.
D000818:Animals; D008854:Microscopy, Electron; D009206:Myocardium / Q000201:enzymology* / Q000648:ultrastructure; D051381:Rats; D000254:Sodium-Potassium-Exchanging ATPase / Q000032:analysis* / Q000378:metabolism
D000254:Sodium-Potassium-Exchanging ATPase
Lokalizatsiia aktivnosti Na+,K+-ATFazy v miotsitakh serdtsa belykh krys na ul'trastrukturnom urovne.