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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
Published on: July 12, 2016
Inverted Potentials Enhance Electron Bifurcation Efficiency Prior to Steady State.
Kiriko Terai1,2, Abigail S Hjelmstad1,3, David N Beratan1,4,5
1Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
The Journal of Physical Chemistry Letters
|June 12, 2026
Summary
Electron bifurcation networks use inverted potentials to prevent energy loss during rapid metabolic state changes. This finding highlights the energetic advantage of inverted potentials in non-steady-state biological systems.
Area of Science:
- Biochemistry
- Bioenergetics
- Metabolic Networks
Background:
- Electron bifurcation networks are crucial for splitting electron pairs efficiently.
- Bifurcating enzymes often utilize cofactors with inverted reduction potentials, but their advantage is unclear.
- Previous models using generic landscapes showed both normal and inverted potentials support steady-state bifurcation.
Purpose of the Study:
- To investigate the impact of potential inversion on the kinetics of steady-state and pre-steady-state bifurcation and confurcation.
- To model redox substrates as finite pools, reflecting biological system limitations.
Main Methods:
- Computational modeling of redox substrates as finite pools.
- Analysis of steady-state and pre-steady-state bifurcation and confurcation kinetics under different potential conditions.
Main Results:
- Both normal and inverted potentials support efficient steady-state bifurcation and confurcation.
- Inverted potentials uniquely suppress short-circuiting and reduce energy dissipation in the pre-steady-state regime.
- This energetic advantage is observed when the network is initiated in an electron-depleted state.
Conclusions:
- Inverted potentials offer a significant energetic advantage during frequent metabolic state transitions (bifurcation/confurcation) where steady state is not maintained.
- The findings suggest a functional role for inverted potentials in dynamic biological systems.
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