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引力场增强生物膜对蔗糖的通透性:对蔗糖空间假说的实验性反驳。

Gravitational field enhances permeability of biological membranes to sucrose: an experimental refutation of sucrose-space hypothesis.

作者信息

Sitaramam V, Sarma M K

出版信息

Proc Natl Acad Sci U S A. 1981 Jun;78(6):3441-5. doi: 10.1073/pnas.78.6.3441.

Abstract

Isotonic conditions for the integrity of subcellular organelles are shown to be remarkably influenced by the concentration of sucrose present during their isolation by centrifugation. Using the technique of enzyme osmometry, we show that the content of sucrose in synaptosomes reflects nearly total equilibration across the membrane during centrifugation, due to altered permeability of membranes. Presence of sucrose in the matrix space of mitochondria, as demonstrated by enzyme osmometry of matrix enzymes, indicates that the sucrose-space hypothesis is invalid.

摘要

等渗条件对亚细胞器完整性的影响显著受离心分离过程中蔗糖浓度的影响。使用酶渗透压测定技术,我们发现突触体中蔗糖的含量反映了离心过程中膜两侧几乎完全的平衡,这是由于膜通透性的改变。通过对线粒体基质酶的酶渗透压测定表明,线粒体基质空间中存在蔗糖,这表明蔗糖空间假说是无效的。

相似文献

3
Does sucrose space exist?蔗糖间隙存在吗?
J Theor Biol. 1981 Jun 7;90(3):317-36. doi: 10.1016/0022-5193(81)90315-5.

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