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Title: Comment on ``Experimental Free Energy Reconstruction From Single-Molecule Force Spectroscopy Using Jarzynski's Equality''

Journal Article · · Physical Review Letters

Harris, Song and Kiang [1] (HSK) describe their results on reconstructing the free energy profiles for both the stretch of the titin polymer, and the unfolding of an individual I27 domain. The new finding reported in [1] is the measurement of the free energy barrier (or activation energy) to unfolding the I27 domain. Due to a misinterpretation of the mechanics involved, the free energy surface (and thus the energy barrier) to unfolding the I27 domain was not measured.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
928521
Report Number(s):
LLNL-JRNL-400499; PRLTAO; TRN: US0803279
Journal Information:
Physical Review Letters, Vol. 100, Issue 1; ISSN 0031-9007
Country of Publication:
United States
Language:
English

References (3)

Free energy reconstruction from nonequilibrium single-molecule pulling experiments journal March 2001
Experimental Free Energy Surface Reconstruction from Single-Molecule Force Spectroscopy using Jarzynski’s Equality journal August 2007
Free Energy Surfaces from Single-Molecule Force Spectroscopy journal July 2005