Coherent Dynamics of Ultrafast Photoreactions in Proteins

在本研究中，我们利用7.5飞秒（10^-15秒）宽的超短脉冲激光进行瞬态吸收测量，研究了光活性蛋白对光照射的初始光反应过程。因此，我们首次成功地观察到具有光合细菌眼睛作用的蛋白质（PYP）光激发态下的发色分子的振动模式，并阐明了蛋白质的结构是通过激发发色团的特定振动模式导致超快异构化的。

In this study, we have investigated initial photo-reaction processes of photo-active proteins which shows remarkable response to light irradiation by transient absorption measurement using ultrashort pulse laser with 7.5 femtosecond(10^-15 second) width at time. As a result, we succeeded in the observation of the vibration modes of the chromophoric molecule in the photo-excited state of protein(PYP) which functioned as the eyes of the photosynthetic bacteria for the first time and elucidated that the structure of the protein causes ultrafast isomerization by evoking specific vibration modes of the chromophore.