大肠杆菌中的质子/钠离子反向转运
Proton/sodium ion antiport in Escherichia coli.
作者信息
West I C, Mitchell P
出版信息
Biochem J. 1974 Oct;144(1):87-90. doi: 10.1042/bj1440087.
Abstract
In anaerobic suspensions of Escherichia coli, after H(+) ions have been translocated outwards across the plasma membrane by a respiratory pulse, re-equilibration is catalysed by Na(+). The sudden addition of a Na(+) salt causes the effective outward translocation of H(+) by an electroneutral process. We conclude that the plasma membrane of E. coli contains a Na(+)/H(+) antiport system that normally translocates Na(+) outwards under the influence of an inwardly directed H(+)-activity gradient.
摘要
在大肠杆菌的厌氧悬浮液中，氢离子通过呼吸脉冲跨质膜向外转运后，重新平衡由钠离子催化。突然添加钠盐会通过电中性过程导致氢离子有效地向外转运。我们得出结论，大肠杆菌的质膜含有一种钠/氢反向转运系统，该系统通常在向内的氢离子活性梯度的影响下将钠离子向外转运。
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