Residual entropy in a model for the unfolding of single-polymer chains

We study the unfolding of a single-polymer chain due to an external force. We use a simplified model which allows to perform all calculations in closed form without assuming a Boltzmann-Gibbs form for the equilibrium distribution. Temperature is then defined by calculating the Legendre transform of the entropy under certain constraints. The application of the model is limited to flexible polymers. It exhibits a gradual transition from compact globule to rod. The boundary line between these two phases shows reentrant behavior. This behavior is explained by the presence of residual entropy.

• Publication year

  2007

• Venue

  EPL (Europhysics Letters)

• Publication date

  2007-04-10

• Fields of study

  Materials Science, Physics

• Identifiers
  DOI 10.1209/0295-5075/81/28007arXiv 0704.1233
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Protein mechanical unfolding: a model with binary variables.

  2007cited by this paper
• Does changing the pulling direction give better insight into biomolecules?

  2007cited by this paper
• Role of conformational entropy in force-induced biopolymer unfolding.

  2007cited by this paper
• A one-dimensional model for theoretical analysis of single molecule experiments

  2006cited by this paper
• Transition records of stationary Markov chains.

  2006cited by this paper
• A two-parameter random walk with approximate exponential probability distribution

  2005cited by this paper
• Force-induced conformational transition in a system of interacting stiff polymers: application to unfolding.

  2005cited by this paper
• The unfolding kinetics of ubiquitin captured with single-molecule force-clamp techniques.

  2004cited by this paper
• Stretching of a Polymer Below the Θ Point

  2003cited by this paper
• Mechanical unfolding of directed polymers in a poor solvent: critical exponents.

  2003cited by this paper
• Elastic response of single DNA molecules exhibits a reentrant collapsing transition.

  2003cited by this paper
• Phase diagram of force-induced DNA unzipping in exactly solvable models.

  2001cited by this paper
• Stretching of single collapsed DNA molecules.

  2000cited by this paper
• Elasticity theory of the B-DNA to S-DNA transition.

  1998cited by this paper
• DNA: An Extensible Molecule

  1996cited by this paper
• On the Deformation Behaviour of Collapsed Polymers

  1991cited by this paper
• Random walk with persistence

  1987cited by this paper

• Stretching single stranded DNA

  2011cites this paper
• The Mean Field Approximation

  2011cites this paper
• Maximum Entropy Estimation of Transition Probabilities of Reversible Markov Chains

  2009cites this paper
• Maximum Entropy Estimation of Transition Probabilities of

  2009cites this paper
• Can re-entrance be observed in force-induced transitions?

  2008cites this paper
• The 3-dimensional random walk with applications to overstretched DNA and the protein titin

  2008cites this paper