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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
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Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
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Multiscale Visualization and Scale-Adaptive Modification of DNA Nanostructures.

Haichao Miao, Elisa De Llano, Johannes Sorger

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    |September 4, 2017
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    This study introduces a multiscale visualization and interaction method for DNA nanostructures, enabling experts to design and modify complex DNA objects efficiently across various abstraction levels. The approach enhances analysis and modification tasks, with applications in medicine and biotechnology.

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    Area of Science:

    • Biotechnology
    • Nanotechnology
    • Structural Biology

    Background:

    • Designing complex DNA nanostructures requires handling intricate details at multiple scales.
    • Existing methods often lack a unified approach for multiscale visualization and interaction.
    • Domain experts need tools that support both low-level manipulation and high-level design.

    Purpose of the Study:

    • To develop a continuous multiscale visualization and interaction space for DNA nanostructures.
    • To enable seamless transitions between different semantic abstraction levels for DNA objects.
    • To support domain experts in designing, analyzing, and modifying complex DNA nanostructures.

    Main Methods:

    • Developed a novel approach to represent DNA nanostructures across ten semantic abstraction scales.
    • Implemented smooth transitions between discrete scales, creating a coherent multiscale environment.
    • Integrated scale-adaptive interactions and special encodings for stability estimation.
    • Collaborated with DNA nanotechnology experts to design and validate the scales and interactions.

    Main Results:

    • Demonstrated a continuous multiscale visualization and interaction space for DNA nanostructures.
    • Enabled users to interact with DNA objects at various levels of semantic abstraction.
    • Showcased improved time efficiency and certainty in analysis and modification tasks for complex structures.
    • Validated the approach through an experimental use case and expert feedback.

    Conclusions:

    • The developed multiscale approach significantly enhances the design and manipulation of complex DNA nanostructures.
    • This method offers a unified platform for addressing challenges in DNA nanotechnology.
    • The approach holds promising applications in medicine and biotechnology, improving efficiency and certainty.