蛙骨骼肌细胞中的可扩散镁
Diffusible magnesium in frog skeletal muscle cells.
作者信息
Maughan D
出版信息
Biophys J. 1983 Jul;43(1):75-80. doi: 10.1016/S0006-3495(83)84325-2.
Abstract
Total diffusible magnesium concentration in frog skeletal muscle is 5.2 mM as determined by electron probe microanalysis of 0.2 nl liquid samples. The calculated free Mg concentration, 0.2 mM, is at the lower end of the range of values reported by others as calculated by methods using nuclear magnetic resonance, Mg-selective microelectrodes, and metallochromic indicator dyes. Magnesium is but one of many elements of physiological importance in muscle that can be analyzed using this novel liquid-sampling and x-ray spectroscopic method.
摘要
通过对0.2 nl液体样本进行电子探针微量分析，测得青蛙骨骼肌中可扩散镁的总浓度为5.2 mM。计算得出的游离镁浓度为0.2 mM，处于其他研究人员通过核磁共振、镁选择性微电极和金属变色指示剂染料等方法所报告的数值范围的下限。镁只是肌肉中许多具有生理重要性的元素之一，而这种新型液体采样和X射线光谱方法可用于分析这些元素。
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