Abstract
Recent revolutionary festinate development of the ultrafast laser technology enable us to take the snapshot of the molecular motion in real-time. These methods have been applied to the dynamics of the photoresponce for many proteins and have shown that the coherence of the vibrational modes of the proteins are sometimes strongly related to their functions. This article reviews such ultrafast photoresponce and their coherent modes of proteins including our recent results. In blue copper protein plastocyanin, which transport electron in photosystem, LMCT band can excite by the laser pulse and the back-electron transfer that takes approximately same pathway for physiological functions, can be probed. In this case, the coherent protein skeletal mode was induced by the reaction. These results shows that protein matrix modes have selectivity for the effective functions of the protein.
