机电应力及pH值对膜结构的影响。

Electromechanical stresses and the effect of pH on membrane structure.

作者信息

Coster H G

出版信息

Biochim Biophys Acta. 1975 Mar 13;382(2):142-6. doi: 10.1016/0005-2736(75)90172-8.

Abstract

The presence of an electric field in a membrane creates stresses which lead to a mechanical compression of the membrane material. It is shown that considerations of this effect yield results consistent with the observed differential effect of pH on the plasma membrane substructure if the central electron-lucent layer in OsO4-fixed membranes is identified with the ionic depletion in the double-fixed charge model of cell membranes.

摘要

膜中电场的存在会产生应力，从而导致膜材料的机械压缩。结果表明，如果将四氧化锇固定膜中的中央电子透明层与细胞膜双固定电荷模型中的离子耗尽相联系，那么考虑这种效应所得到的结果与观察到的pH对质膜亚结构的差异效应是一致的。