Issue 12, 2010
From the journal:

Soft Matter

Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

Xiang-qiang Chu,a   Marco Lagi,ab   Eugene Mamontov,c   Emiliano Fratini,b   Piero Baglionib  and  Sow-Hsin Chen*a  

* Corresponding authors

a Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
E-mail: sowhsin@mit.edu

b Department of Chemistry and CSGI, University of Florence, Sesto Fiorentino, Florence, Italy

c Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, USA

Abstract

We observe a logarithmic-like decay of the intermediate scattering function (ISF) of the hydrogen atoms in the protein molecule in the time interval from 10 ps to 1 ns. We analyze the ISF, FH(Q,t), in terms of an asymptotic expression proposed by mode coupling theory (MCT). The result clearly shows that this logarithmic stretching of the β-relaxation range is real, substantiating the prediction of the molecular dynamics (MD) simulation results that used the formula proposed by MCT for the analysis of ISF.

Graphical abstract: Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

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Article information

DOI
https://doi.org/10.1039/C002602F
Article type
Communication
Submitted
08 Feb 2010
Accepted
27 Apr 2010
First published
24 May 2010

Soft Matter, 2010,6, 2623-2627

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Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

X. Chu, M. Lagi, E. Mamontov, E. Fratini, P. Baglioni and S. Chen, Soft Matter, 2010, 6, 2623 DOI: 10.1039/C002602F

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