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Related Concept Videos

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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
pV-Diagrams01:18

pV-Diagrams

The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
Vector Algebra: Graphical Method01:10

Vector Algebra: Graphical Method

Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
Sequence Networks of Rotating Machines01:24

Sequence Networks of Rotating Machines

A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...

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Related Experiment Video

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Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline
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A multilevel layout algorithm for visualizing physical and genetic interaction networks, with emphasis on their

Johannes Tuikkala1, Heidi Vähämaa, Pekka Salmela

  • 1Department of Mathematics, FI-20014 University of Turku, Turku, Finland. tero.aittokallio@fimm.fi.

Biodata Mining
|March 28, 2012
PubMed
Summary

A new Multilevel Layout plugin enhances biological network visualization by capturing hierarchical modularity. This method improves graph drawing for large-scale biological networks, offering biologically relevant and visually appealing layouts.

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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

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Area of Science:

  • Systems Biology
  • Bioinformatics
  • Computational Biology

Background:

  • Graph drawing is crucial for systems biology, aiding in the visual exploration of large biological networks.
  • Current layout algorithms in platforms like Cytoscape may not accurately reflect biological processes or become uninformative for dense/large networks.
  • Understanding how graph layouts represent network connectivity is essential for biological interpretation.

Purpose of the Study:

  • To develop and evaluate a novel graph layout approach for biological networks.
  • To improve the visualization of large-scale and complex biological networks.
  • To provide a framework for evaluating and optimizing graph drawing algorithms in systems biology.

Main Methods:

  • Implemented a modified layout plugin, Multilevel Layout, using a multilevel optimization framework.
  • Applied conventional layout algorithms within this framework to capture hierarchical modularity.
  • Conducted a systematic evaluation of the Multilevel Layout against other Cytoscape algorithms using diverse biological networks.

Main Results:

  • The Multilevel Layout produced biologically relevant and visually pleasing layouts for various network types.
  • Demonstrated improved visualization for large-scale yeast genetic interaction and human physical interaction networks.
  • Developed a biological evaluation framework applicable to existing and future graph drawing algorithms.

Conclusions:

  • Leveraging multilevel modular organization enhances biological network visualization.
  • The developed biological evaluation framework aids in assessing and optimizing layout solutions.
  • This approach offers convenient visualizations for numerous network biology applications.