Universal Force Correlations in an RNA-DNA Unzipping Experiment

TL;DR

This paper investigates universal force correlations in RNA-DNA unzipping experiments, demonstrating that macroscopic correlations are sequence-independent and confirming theoretical predictions through experimental validation.

Contribution

It introduces a field theory approach to describe universal force correlations in RNA-DNA unzipping, validated by experimental data and exact solutions.

Findings

Macroscopic force correlations are sequence-independent.

Field theory predictions match experimental results.

Confirmed the universality of force correlations in biological unzipping.

Abstract

We study unzipping of a complementary RNA-DNA helix applied to an external force, focusing on the force-force correlations. While at the microscopic level these are given by the sequence, the experiment measures effective, macroscopic correlations. The latter are sequence-independent, i.e. universal, and constitute the central object of the underlying field theory of disordered systems. Comparing field-theory predictions and the exact solution of a 1-d toy model with the experiment, we find an excellent agreement, confirming fundamental theoretical concepts via a biologically inspired experiments.