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Related Experiment Videos

[Tissue thromboplastin in the human brain].

R F Baĭkiev, A N Chernov, A V Il'iasov

    Ukrainskii Biokhimicheskii Zhurnal (1978)
    |November 1, 1989
    PubMed
    Summary

    Scanning electron microscopy revealed membrane-like structures in human brain tissue thromboplastin. Phospholipids form hexagonal cylinders in water, influenced by the protein moiety, with Ca2+ increasing structural rigidity.

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    Doklady Akademii nauk·1999

    Area of Science:

    • Biochemistry
    • Biophysics
    • Materials Science

    Context:

    • Tissue thromboplastin, crucial for blood coagulation, contains phospholipids and protein components.
    • Understanding the structural organization of tissue thromboplastin is vital for its biological function.

    Purpose:

    • To investigate the structural characteristics of human brain tissue thromboplastin using scanning electron microscopy.
    • To elucidate the role of phospholipids and protein moiety in the structural organization and phase behavior of tissue thromboplastin.

    Summary:

    • Scanning electron microscopy identified membrane-like structures in dry human brain tissue thromboplastin preparations.
    • In aqueous environments, thromboplastin's phospholipids self-assemble into hexagonal (H11) cylinders.
    • The protein component significantly impacts phospholipid phase state and fatty acid chain dynamics.
    • Calcium ions (Ca2+) do not alter the phospholipid phase state but enhance the rigidity of both polar and hydrophobic regions within the structure.

    Impact:

    • Provides insights into the supramolecular organization of tissue thromboplastin.
    • Contributes to understanding the biophysical properties of coagulation factors.
    • May inform the development of therapeutic strategies related to hemostasis.

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