Model for melting of confined DNA

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

When DNA molecules are heated they denature. This occurs locally so that loops of molten single DNA strands form, connected by intact double-stranded DNA pieces. The properties of this "melting" transition have been intensively investigated. Recently there has been a surge of interest in this question, in part caused by experiments determining the properties of partially bound DNA confined to nanochannels. But how does such confinement affect the melting transition? To answer this question we introduce and solve a model predicting how confinement affects the melting transition for a simple model system by first disregarding the effect of self-avoidance. We find that the transition is smoother for narrower channels. By means of Monte Carlo simulations we then show that a model incorporating self-avoidance shows qualitatively the same behavior and that the effect of confinement is stronger than in the ideal case.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Biofysik
Originalspråkengelska
Artikelnummer060702
TidskriftPhysical Review E (Statistical, Nonlinear, and Soft Matter Physics)
Volym91
Utgivningsnummer6
StatusPublished - 2015
PublikationskategoriForskning
Peer review utfördJa