Similarity of primary radical pair recombination in photosystem II and bacterial reaction centers
Similarity of primary radical pair recombination in photosystem II and bacterial reaction centers
复制标题
光系统II和细菌反应中心初级自由基对重组的相似性
DOI：
10.1016/0014-5793(93)80837-k
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发表时间：
1993
期刊：
影响因子：
3.5
通讯作者：
M. Michel
中科院分区：
文献类型：
--
作者：
M. Volk;M. Gilbert;G. Rousseau;M. Richter;A. Ogrodnik;M. Michel
我们报告了光系统 II D1D2cytb559 反应中心中自由基对 P680+Pheo− 重组动力学的温度和磁场依赖性测量，并将结果与细菌反应中心获得的结果进行比较。在光系统 II 中，重组到基态的速率比细菌反应中心慢至少 50 倍。这种差异是由于植物和细菌反应中心的色素氧化还原电位不同而产生的。相反，所有反应中心中三重态的重组速率相似，表明相似的电子耦合，这使我们能够得出结构相似性的结论。
We report temperature and magnetic field dependent measurements of the recombination dynamics of the radical pair P680+Pheo−in D1D2cytb559reaction centers of photosystem II and compare the results to those obtained in bacterial reaction centers. In photosystem II the rate of recombination to the groundstate is found to be slower than in the bacterial reaction centers by a factor of at least 50. This difference arises from the different redox potentials of the pigments of plant and bacterial reaction centers. In contrast, the rate of recombination to the triplet state is similar in all reaction centers, indicating a similar electronic coupling which allows us to conclude upon the structural similarity.