Calcium Binding by Particle-Free Supernatants of Homogenates of Skeletal Muscle
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چکیده
منابع مشابه
Calcium Binding by Particle-Free Supernatants of Homogenates of Skeletal Muscle
A high molecular weight fraction of a soluble Marsh muscle-relaxing preparation has been shown to contain a calcium-complexing substance. By examining the nature of the competition between this fraction and chelex-100 for calcium at various total calcium concentrations it has been possible to calculate the concentration and calcium stability constant of this calcium-complexing substance. Taking...
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Plasma membranes isolated from rabbit muscle possessed the ability to bind and accumulate calcium ions; these processes required ATP and Mg*+. Binding of Ca2+ was rapid, reaching a maximum within 30 s and was greatly increased in the presence of oxalate or phosphate. The concentrations of Ca2+, Mg2+, and ATP required for half-maximal ATP-dependent calcium binding were 20 KM, 150 PM, and 20 to 3...
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15 صفحه اولThe Influence of Hydrogen Ion Concentration on Calcium Binding and Release by Skeletal Muscle Sarcoplasmic Reticulum
Calcium release and binding produced by alterations in pH were investigated in isolated sarcoplasmic reticulum (SR) from skeletal muscle. When the pH was abruptly increased from 6.46 to 7.82, after calcium loading for 30 sec, 80-90 nanomoles (nmole) of calcium/mg protein were released. When the pH was abruptly decreased from 7.56 to 6.46, after calcium loading for 30 sec, 25-30 nmole of calcium...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1965
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.49.1.131