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Inferring the diameter of a biopolymer from its stretching response

TOAN NM
•
MARENDUZZO D
•
Micheletti, Cristian
2005
  • journal article

Periodico
BIOPHYSICAL JOURNAL
Abstract
We investigate the stretching response of a thick polymer model by means of extensive stochastic simulations. The computational results are synthesized in an analytic expression that characterizes how the force versus elongation curve depends on the polymer structural parameters: its thickness and granularity (spacing of the monomers). The expression is used to analyze experimental data for the stretching of various different types of biopolymers: polypeptides, polysaccharides and nucleic acids. Besides recovering elastic parameters (such as the persistence length) that are consistent with those obtained from standard entropic models, the approach allows to extract viable estimates for the polymers diameter and granularity. This shows that the basic structural polymer features have such a profound impact on the elastic behaviour that they can be recovered with the sole input of stretching measurements.
DOI
10.1529/biophysj.104.058081
WOS
WOS:000230114500013
Archivio
http://hdl.handle.net/20.500.11767/16061
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-23244451449
Diritti
closed access
Scopus© citazioni
29
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
28
Data di acquisizione
Mar 28, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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