Chemical compass model of avian magnetoreception
Chemical compass model of avian magnetoreception
复制标题
鸟类磁感应的化学罗盘模型
DOI：
10.1038/nature06834
复制
发表时间：
2008-05-15
期刊：
影响因子：
64.8
通讯作者：
Hore, P. J.
中科院分区：
文献类型：
--
作者：
Maeda, Kiminori;Henbest, Kevin B.;Hore, P. J.
大约50种物种，包括鸟类，哺乳动物，爬行动物，两栖动物，鱼类，甲壳类动物和昆虫，已知使用地球磁场进行定位和导航（1）。特别是鸟类已经得到了深入的研究，但对鸟类磁罗盘背后的生物物理机制仍然知之甚少。一个基于磁敏感自由基反应的提议（2，3）正在获得支持（4-11），尽管事实上没有体外化学反应显示出对地球磁场（类似于50 μ T）的微弱磁场的反应或对这种磁场的方向敏感。在这里，我们使用类胡萝卜素-卟啉-富勒烯模型系统的光谱观察来证明光化学形成的自由基对的寿命通过应用
Approximately 50 species, including birds, mammals, reptiles, amphibians, fish, crustaceans and insects, are known to use the Earth's magnetic field for orientation and navigation(1). Birds in particular have been intensively studied, but the biophysical mechanisms that underlie the avian magnetic compass are still poorly understood. One proposal, based on magnetically sensitive free radical reactions(2,3), is gaining support(4-11) despite the fact that no chemical reaction in vitro has been shown to respond to magnetic fields as weak as the Earth's (similar to 50 mu T) or to be sensitive to the direction of such a field. Here we use spectroscopic observation of a carotenoid-porphyrin-fullerene model system to demonstrate that the lifetime of a photochemically formed radical pair is changed by application of