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Report No.

Protein dynamics studies by neutron incoherent scattering

Kataoka, Mikio; Nakagawa, Hiroshi  

Protein works in an aqueous environment at ambient temperature, indicating that protein cannot escape from thermal fluctuations. Protein conformation is fluctuating thermally. The protein dynamics is related to the biological function. Inelastic neutron scattering is unique method that gives information about the protein dynamics in time and space axis. However, the application of neutron to biology is quite limited so far because the signal from biological samples is weak and the incident neutron flux is not necessarily sufficient. But this situation has been improving by constructing the new neutron sources, such as J-PARC and SNS. In this chapter the neutron scattering study of protein dynamics in the wide time and space range will be reviewed. The most observable phenomena such as a protein Boson peak and dynamical transition are also observed in the other soft matter materials. These studies should contribute to the soft matter physics. In the field of biophysics, these dynamical properties are important to understand the biological function of the proteins.



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