Proton-polarized states in DNA.

Area of Science:

• * Biophysics
• * Physical Chemistry
• * Statistical Mechanics

Background:

• * DNA's physical properties are crucial for its biological functions.
• * Understanding DNA phase transitions can offer insights into molecular interactions and stability.
• * Non-invasive techniques are sought for probing DNA at the molecular level.

Purpose of the Study:

• * To investigate phase transition signatures in double-stranded DNA (dsDNA).
• * To explore the potential role of proton interactions in DNA dynamics.
• * To apply a semiconductor-electrolyte interface technique for biophysical analysis.

Main Methods:

• * Employed a non-invasive semiconductor-electrolyte interface technique.
• * Utilized statistical physics methodologies for data analysis.
• * Monitored electromotive force and calculated dynamic entropy.

Main Results:

• * Observed a distinct coherence peak in electromotive force.
• * Detected a significant decline in dynamic entropy at critical temperature and pH.
• * Identified signatures consistent with a phase transition in the dsDNA fragment.

Conclusions:

• * The study provides evidence for a DNA phase transition under specific conditions.
• * Findings suggest a possible mechanism involving dynamic interaction of proton pairs (q=2+).
• * The applied technique offers a novel approach for studying DNA molecular dynamics.