Softening of DNA near melting as disappearance of an emergent property

Debjyoti Majumdar, Somendra M. Bhattacharjee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Near the melting transition the bending elastic constant κ, an emergent property of double-stranded DNA (dsDNA), is shown not to follow the rodlike scaling for small-length N. The reduction in κ with temperature is determined by the denatured bubbles for a continuous transition, e.g., when the two strands are Gaussian, but by the broken bonds near the open end in a Y-like configuration for a first-order transition as for strands with excluded volume interactions. In the latter case, a lever rule is operational, implying a phase coexistence although dsDNA is known to be a single phase.

Original languageEnglish
Article number032407
JournalPhysical Review E
Volume102
Issue number3
DOIs
StatePublished - 16 Sep 2020
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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