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豚鼠大脑皮层中己糖激酶的亚细胞分布及特性

The subcellular distribution and properties of hexokinases in the guinea-pig cerebral cortex.

作者信息

Bachelard H S

出版信息

Biochem J. 1967 Jul;104(1):286-92. doi: 10.1042/bj1040286.

Abstract
  1. Hexokinase activities were estimated in primary subcellular fractions from guinea-pig cerebral cortex and in sucrose-density-gradient subfractions of the mitochondrial and microsomal fractions. 2. Appreciable activities were observed in mitochondrial, microsomal and soluble fractions. The activity in the mitochondrial fraction was associated with the mitochondria rather than with myelin or nerve endings and that in the microsomal fraction was associated with membrane fragments. 3. Most of the mitochondrial activity was extracted in soluble form by osmotic ;shock'. The activity of the mitochondrial extract differed from the soluble activity in kinetic properties and in electrophoretic behaviour. 4. No evidence was obtained for the presence of a high-K(m) glucokinase in the brain. 5. The results are discussed in terms of relevance to considerations of glucose utilization by the brain.
摘要
  1. 对豚鼠大脑皮层初级亚细胞组分以及线粒体和微粒体组分的蔗糖密度梯度亚组分中的己糖激酶活性进行了评估。2. 在线粒体、微粒体和可溶性组分中观察到了明显的活性。线粒体组分中的活性与线粒体相关,而非与髓磷脂或神经末梢相关,微粒体组分中的活性与膜碎片相关。3. 大部分线粒体活性通过渗透“休克”以可溶形式提取出来。线粒体提取物的活性在动力学性质和电泳行为上与可溶性活性不同。4. 未获得大脑中存在高K(m)葡萄糖激酶的证据。5. 根据与大脑葡萄糖利用相关的考虑对结果进行了讨论。

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Subcellular localization of hexokinase in the rat cortex.己糖激酶在大鼠皮层中的亚细胞定位。
Neurosci Behav Physiol. 1973 Jul-Sep;6(3):218-27. doi: 10.1007/BF01190345.

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Subcellular localization of hexokinase in the rat cortex.己糖激酶在大鼠皮层中的亚细胞定位。
Neurosci Behav Physiol. 1973 Jul-Sep;6(3):218-27. doi: 10.1007/BF01190345.

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