论文标题
磁噪声启用生物综合
Magnetic Noise Enabled Biocompass
论文作者
论文摘要
磁蛋白的发现提供了对分子水平生物综合的新理解。但是，磁蛋白使生物综合的机制仍在争论中，这主要是因为在室温下磁性蛋白质中没有永久性磁性。在这里，基于一个广泛接受的生物综合基的自由基对模型，我们提出了一种微观机制，该机制使生物综合可以在生物学环境中进行磁蛋白的有限磁化而进行操作。借助磁蛋白的结构，我们表明磁性蛋白质的磁波动而不是永久性磁性可以实现地磁场感应。对微观模型的量子动力学的分析揭示了最佳灵敏度的必要条件。我们的工作阐明了磁蛋白可以实现生物综合的机制。
The discovery of magnetic protein provides a new understanding of a biocompass at the molecular level. However, the mechanism by which magnetic protein enables a biocompass is still under debate, mainly because of the absence of permanent magnetism in the magnetic protein at room temperature. Here, based on a widely accepted radical pair model of a biocompass, we propose a microscopic mechanism that allows the biocompass to operate without a finite magnetization of the magnetic protein in a biological environment. With the structure of the magnetic protein, we show that the magnetic fluctuation, rather than the permanent magnetism, of the magnetic protein can enable geomagnetic field sensing. An analysis of the quantum dynamics of our microscopic model reveals the necessary conditions for optimal sensitivity. Our work clarifies the mechanism by which magnetic protein enables a biocompass.
