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Related Concept Videos

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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters
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Channel-facilitated transport under resetting dynamics.

Suvam Pal1, Denis Boyer2, Leonardo Dagdug3

  • 1Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata, India.

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|October 10, 2024
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Summary
This summary is machine-generated.

Resetting particle transport through channels can be optimized. This study identifies conditions where stochastic resetting enhances particle escape, improving transport efficiency in biological and physical systems.

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Area of Science:

  • Physics
  • Chemistry
  • Biological Sciences

Background:

  • Particle transport through channels is crucial in various scientific fields.
  • Biological membranes utilize protein channels for solute transport.
  • Understanding particle dynamics within channels provides valuable insights.

Purpose of the Study:

  • To investigate channel-facilitated transport of a diffusive particle with attractive wall interactions.
  • To analyze the impact of stochastic resetting on particle escape times.
  • To determine conditions under which resetting enhances particle escape.

Main Methods:

  • Analytical determination of escape time statistics.
  • Brownian dynamics simulations for verification.
  • Modeling a one-dimensional channel with attractive interactions.

Main Results:

  • Identified physical conditions for beneficial resetting.
  • Demonstrated enhanced particle escape from the channel via resetting.
  • Validated theoretical predictions with simulations across various interaction strengths.

Conclusions:

  • Stochastic resetting strategies can universally enhance complex transport processes.
  • This approach is promising for single and long molecule transport through biological membranes.
  • Resetting offers a tunable mechanism to control and optimize particle transport.