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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Vesicular Tubular Clusters01:45

Vesicular Tubular Clusters

After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Formation of Higher-order Actin Filaments01:11

Formation of Higher-order Actin Filaments

The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
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Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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Related Experiment Video

Updated: Jun 12, 2026

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations
05:22

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations

Published on: March 21, 2019

Active transport and cluster formation on 2D networks.

P Greulich1, L Santen

  • 1Fachrichtung Theoretische Physik, Universität des Saarlandes, Saarbrücken, Germany. pg@thp.uni-koeln.de

The European Physical Journal. E, Soft Matter
|June 18, 2010
PubMed
Summary

We developed a model for active transport on complex networks, revealing scale-free particle clusters due to preferential attachment. Other models showed finite-sized clusters under specific conditions.

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Area of Science:

  • Physics
  • Biophysics
  • Network Science

Background:

  • Vesicular transport relies on active movement along cellular networks.
  • Understanding particle dynamics on complex, inhomogeneous networks is crucial.

Purpose of the Study:

  • To model active transport on inhomogeneous networks with hard-core interactions.
  • To investigate the emergence and characteristics of particle clusters.

Main Methods:

  • Development of a computational model for active transport.
  • Analysis of particle cluster distributions and scale-free behavior.
  • Comparison with diffusion-limited aggregation and regular network models.

Main Results:

  • Observation of scale-free particle clusters with algebraically decaying distributions.
  • Identification of preferential attachment as a mechanism for cluster growth.
  • Contrast with finite-sized clusters in diffusion-limited aggregation and regular networks.

Conclusions:

  • Inhomogeneous networks with hard-core interactions promote scale-free cluster formation.
  • Preferential attachment drives the growth of large-scale clusters.
  • Model systems differ in cluster size characteristics based on network structure and conditions.