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Related Experiment Videos

Yeast plasma membrane vesicles suitable for transport studies.

E Wehrli, C Boehm, G F Fuhrmann

    Journal of Bacteriology
    |December 1, 1975
    PubMed
    Summary

    Isolated yeast plasma membrane vesicles act as a barrier to potassium and glucose transport. Uranium ions (UO(2)(2+)) were found to inhibit glucose movement across the membrane.

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    Area of Science:

    • * Biochemistry and Molecular Biology
    • * Cell Biology
    • * Membrane Transport

    Background:

    • * The yeast plasma membrane is a critical barrier regulating the passage of ions and molecules.
    • * Understanding membrane permeability is essential for comprehending cellular function and nutrient uptake.

    Purpose of the Study:

    • * To investigate the permeability characteristics of isolated yeast plasma membrane vesicles.
    • * To identify specific ions that affect membrane transport, particularly for glucose.

    Main Methods:

    • * Utilized isolated yeast plasma membrane vesicles for permeability studies.
    • * Assessed the transport of potassium (K(+)) and glucose across the vesicle membrane.
    • * Examined the effect of uranyl ions (UO(2)(2+)) on glucose influx and efflux.

    Main Results:

    • * Yeast plasma membrane vesicles exhibited a significant permeability barrier to K(+) and glucose.
    • * The influx and efflux of glucose were demonstrably inhibited by the presence of UO(2)(2+) ions.
    • * Potassium transport was also restricted, indicating a general barrier function.

    Conclusions:

    • * Isolated yeast plasma membrane vesicles effectively regulate the passage of essential molecules like glucose.
    • * Uranyl ions represent a potent inhibitor of glucose transport across the yeast plasma membrane.
    • * These findings contribute to the understanding of membrane transport mechanisms and potential regulatory factors.

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