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Theoretical Analysis of Single-Molecule Force Spectroscopy Experiments: Heterogeneity of Chemical Bonds

M. Raible ^*, M. Evstigneev ^*, F. W. Bartels , R. Eckel , M. Nguyen-Duong , R. Merkel , R. Ros , D. Anselmetti  and P. Reimann ^*

^* Theoretische Physik, and Experimentelle Biophysik, Universität Bielefeld, Bielefeld, Germany; and Institute of Thin Films and Interfaces, Research Centre Jülich, Jülich, Germany

Correspondence: Address reprint requests to Mykhaylo Evstigneev, E-mail: mykhaylo{at}physik.uni-bielefeld.de.

We show that the standard theoretical framework in single-molecule force spectroscopy has to be extended to consistently describe the experimental findings. The basic amendment is to take into account heterogeneity of the chemical bonds via random variations of the force-dependent dissociation rates. This results in a very good agreement between theory and rupture data from several different experiments.

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