Cardiac Myosin Adenosinetriphosphatase Activity
نویسندگان
چکیده
منابع مشابه
Cardiac myosin adenosinetriphosphatase activity. Modifying factors and comparison with skeletal muscle myosin adenosinetriphosphatase activity.
Cardiac myosin prepared by any one of a number of modifications of the basic Szent-Gyorgyi method and cardiac myosin prepared by the lithium chloride-ammonium sulfate technique differ in two important respects: 1) SzentGyorgyi-prepared myosin solutions are inhomogeneous by both chemical and immunologic criteria; 2) the ATPase activity of Szent-Gyorgyi-prepared myosin is low in comparison to lit...
متن کاملCardiac Myosin Adenosinetrlphosphatase Activity MODIFYING FACTORS AND COMPARISON WITH SKELETAL MUSCLE MYOSIN ADENOSINETRIPHOSPHATASE ACTIVITY
Cardiac myosin prepared by any one of a number of modifications of the basic Szent-Gyorgyi method and cardiac myosin prepared by the lithium chloride-ammonium sulfate technique differ in two important respects: 1) SzentGyorgyi-prepared myosin solutions are inhomogeneous by both chemical and immunologic criteria; 2) the ATPase activity of Szent-Gyorgyi-prepared myosin is low in comparison to lit...
متن کاملReduced cardiac myosin adenosinetriphosphatase activity in dogs with spontaneously occurring heart failure.
Cardiac myosin was isolated from the hearts of seven dogs with naturally occurring heart failure. Six of the seven dogs had heart failure secondary to acquired mitral valvular insufficiency; the seventh was believed to have a primary myocardiopathy. The characteristics of this myosin were compared to cardiac myosin from a group of normal dogs studied concurrently. Cardiac myosin was extracted f...
متن کاملHydrogen ion buffers and enzymatic activity: myosin B adenosinetriphosphatase.
The production of hydrogen ions during the hydrolysis of ATP by myosin B and the consequent fall in pH can produce alterations in enzymatic activity directly, or by influencing Ca ion concentrations controlled by metal-chelate systems. Adequate hydrogen ion buffer systems can limit pH changes to acceptable levels. However, several commonly used hydrogen ion buffers have been reported to have sp...
متن کاملCardiac myosin adenosinetriphosphatase of rat and mouse. Distinctive enzymatic properties compared with rabbit and dog cardiac myosin.
Cardiac myosin obtained from rats and mice (smaller animals) had a higher adenosinetriphosphatase (ATPase) activity in the presence of calcium ions (Ca) than did cardiac myosin from rabbits and dogs (larger animals). Structural differences between the two types of cardiac myosin were suggested by the lower apparent activation energy of the Caactivated ATPase reaction catalyzed by cardiac myosin...
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ژورنال
عنوان ژورنال: Circulation Research
سال: 1966
ISSN: 0009-7330,1524-4571
DOI: 10.1161/01.res.19.2.283