细菌视紫红质中的电场效应。
Electric field effects in bacteriorhodopsin.
作者信息
Shinar R, Druckmann S, Ottolenghi M, Korenstein R
出版信息
Biophys J. 1977 Jul;19(1):1-5. doi: 10.1016/S0006-3495(77)85558-6.
Abstract
Exposure of aqueous suspensions of fragments of the purple membrane of Halobacterium halobium to electric field pulses leads to transient linear dichroism phenomena. The effects are interpreted in terms of field-induced alignments of the bacteriorhodopsin chromophore. Two observed relaxation times (tau) are attributed to rotation of the whole membrane fragments (tau s approximately 100 ms), and to a much faster reorientation of the chromophore within membrane (tau f approximately 260 microns).
摘要
将嗜盐菌紫色膜片段的水悬浮液暴露于电场脉冲会导致瞬态线性二色性现象。这些效应是根据电场诱导的细菌视紫红质发色团排列来解释的。观察到的两个弛豫时间（τ）分别归因于整个膜片段的旋转（τs约为100毫秒），以及发色团在膜内更快的重新取向（τf约为260微秒）。
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