EFFECT OF HYPOXIA ON CHANGE IN MEMBRANE CONDUCTANCE EVOKED BY ILLUMINATION IN ARTHROPOD PHOTORECEPTORS
EFFECT OF HYPOXIA ON CHANGE IN MEMBRANE CONDUCTANCE EVOKED BY ILLUMINATION IN ARTHROPOD PHOTORECEPTORS
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DOI：
10.1038/newbio244146b0
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发表时间：
1973-01-01
期刊：
影响因子：
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通讯作者：
MAURO, A
中科院分区：
文献类型：
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作者：
BAUMANN, F;MAURO, A
在各种各样的光感受器细胞中，已经证实细胞膜的电导受光改变，光感受器电位是这种改变的直接结果。到目前为止已报道的研究中，脊椎动物光感受器1、2的膜电导随光照而下降(原始链3被膜的大银鱼除外)，而无脊椎动物的光感受器4-8的膜电导则上升。光诱导的色素发色团的异构化是电学反应的主要事件，这一假说已被广泛接受，但将电导的变化与光诱导的光诱导的色素团的变化联系起来的转导机制仍有待阐明。
IN a wide variety of photoreceptor cells it has been established that the conductance of the cell membrane is altered by light and that the photoreceptor potential is a direct consequence of this change. In the studies reported so far the membrane conductance of vertebrate photoreceptors1,2falls on illumination (with the exception of the tunicateSalpa democratica, a primitive chordate3) whereas in invertebrate photoreceptors4–8it rises. The hypothesis that a light-induced isomerization of the photopigment chromophore, for example, retinal, is the primary event underlying the electrical response has been widely accepted, but the transduction mechanism connecting the change in conductance with the light-induced change in the photopigment remains to be elucidated.