The thermal denaturation of DNA studied with neutron scattering
Andrew Wildes (ILL), Nikos Theodorakopoulos, Jessica Valle Orero (ILL,, Phys-ENS), Santiago Cuesta-Lopez (Phys-ENS), Jean-Luc Garden (NEEL), Michel, Peyrard (Phys-ENS)
TL;DR
This study uses neutron scattering to investigate the DNA melting transition, providing spatial correlation data along the molecule that complements other techniques.
Contribution
It uniquely measures the DNA melting process with neutron scattering and interprets the data using the Peyrard-Bishop-Dauxois model with a single free parameter.
Findings
Neutron scattering reveals spatial correlations during DNA melting.
Bragg peak analysis shows temperature-dependent changes.
Model fitting with PBD captures melting behavior.
Abstract
The melting transition of deoxyribonucleic acid (DNA), whereby the strands of the double helix structure completely separate at a certain temperature, has been characterized using neutron scattering. A Bragg peak from B-form fibre DNA has been measured as a function of temperature, and its widths and integrated intensities have been interpreted using the Peyrard-Bishop-Dauxois (PBD) model with only one free parameter. The experiment is unique, as it gives spatial correlation along the molecule through the melting transition where other techniques cannot.
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