Related Experiment Video
Updated: Aug 7, 2026
10:16
Optical Control of Living Cells Electrical Activity by Conjugated Polymers
Published on: January 28, 2016
Long-lived conformation changes induced by electric impulses in biopolymers
Summary
Electric impulses can alter biopolymer structures, like RNA, by inducing conformational changes. This study proposes a polarization mechanism to explain these structural transitions, offering insights into biological memory.
Area of Science:
- Biophysics
- Molecular Biology
- Biochemistry
Background:
- Biopolymers can exhibit metastable states, making them susceptible to external stimuli.
- Electric impulses are known to interact with biological molecules.
Purpose of the Study:
- To investigate the effects of electric impulses on metastable biopolymers.
- To propose a mechanism explaining structural transitions induced by electric fields.
Main Methods:
- Experiments were conducted on poly(A).2 poly(U) and ribosomal RNA.
- Applied electric fields of approximately 20 kV/cm with a decay time of 10 microseconds were used.
Main Results:
- Electric impulses induced long-lived conformational changes in the tested biopolymers.
- A polarization mechanism involving ionic atmosphere shifts and strand repulsion was proposed.
- Observed structural transitions included partial unwinding of polynucleotide helices.
Conclusions:
- The proposed polarization mechanism explains electric impulse-induced structural changes in biopolymers.
- The findings suggest potential implications for understanding biological memory recording mechanisms.
