ULTRASTRUCTURAL LOCALIZATION OF G6PASE ACTIVITY IN THE RAT MYOCARDIAL CELLS
- VernacularTitle:葡萄糖-6-磷酸酶在大白鼠心肌细胞超微结构的定位
- Author:
Yusheng HAN
;
Xiaoping QI
;
Yuying CHEN
- Publication Type:Journal Article
- Keywords:
Ultrastructure;
Myocardial Cells;
Sarcoplasmic reticulum;
G6Pase;
Rat
- From:
Acta Anatomica Sinica
1957;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Glucose-6-Phosphatase (G6Pase) was regarded as a marker enzyme of the endoplasmic reticulum in a number of different cells. The purpose of this report is to study the localization of G6Pase activity in the rat left ventricular myocardial cells. G6Pase activity was found in the lumen of the nuclear envelope, the sarcoplasmic reticulum(SR) and the subsarcolemmal cisterns. The SR tubules between the adjacent myofibrils displayed characteristic distribution on their longitudinal profiles, as a curtain-like network, the tubules appeared to be tight network facing A-band, whereas tubules formed large polygonal meshes facing I-band. It is thought that the SR tubules facing A- and I-bands, respectively, represented an adaptation of SR to the selective shortening of the myofibrils at the I-band during contraction.
