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Related Experiment Videos

[Structure of polylysine-DNA complexes]

A T Khachatrian, V A Ter-Nikogosian, S M Akopian

    Biofizika
    |September 1, 1982
    PubMed
    Summary

    Poly-I-lysine forms nucleosome-like structures with phage T2 DNA. Nuclease digestion revealed DNA fragments, suggesting a protective role for poly-I-lysine in DNA organization.

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    [The capacity of anaerobically grown bacteria to exchange the 2H+ of the cell for the K+ of the medium and to maintain a high K+ distribution between cell and medium].

    Nauchnye doklady vysshei shkoly. Biologicheskie nauki·1986

    Area of Science:

    • Molecular Biology
    • Biophysics
    • Genetics

    Context:

    • Investigating the interaction between poly-I-lysine and bacteriophage T2 DNA.
    • Utilizing nuclease digestion and electron microscopy to analyze complex structures.

    Purpose:

    • To characterize the structural organization of poly-I-lysine-DNA complexes.
    • To identify DNA fragments protected by poly-I-lysine.

    Summary:

    • Micrococcal nuclease digestion of poly-I-lysine-phage T2 DNA complexes yielded nuclease-resistant structures.
    • These structures contained DNA fragments of approximately 300, 600, and 1200 base pairs.
    • Electron microscopy revealed structures with a superficial resemblance to nucleosomes.

    Impact:

    • Provides insights into the DNA-binding properties of poly-I-lysine.
    • Suggests potential roles for poly-lysine in DNA packaging or protection.
    • Contributes to understanding non-canonical chromatin structures.

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