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Related Experiment Videos

A modified direct phosphate assay for studying ATPases.

W T Jenkins, M M Marshall

    Analytical Biochemistry
    |August 15, 1984
    PubMed
    Summary

    This study introduces a fast and sensitive assay for purified ATPases using phosphomolybdate formation and extraction. Imidazole enhances assay performance by forming a complex, improving reproducibility for enzyme activity determination.

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    Area of Science:

    • Biochemistry
    • Enzymology

    Background:

    • Adenosine Triphosphatases (ATPases) are crucial enzymes involved in various cellular processes.
    • Accurate and efficient assays are needed for studying ATPase activity and kinetics.

    Purpose of the Study:

    • To develop a simple, rapid, and sensitive assay for purified ATPases.
    • To optimize assay conditions for improved sensitivity and reproducibility.

    Main Methods:

    • The assay is based on the formation of phosphomolybdate from ATP hydrolysis.
    • Phosphomolybdate is extracted into butyl acetate for quantification.
    • Imidazole is included to enhance sensitivity and reproducibility.

    Main Results:

    • The assay demonstrates high sensitivity and rapid measurement of ATPase activity.
    • Imidazole inclusion forms an imidazole-phosphomolybdate complex, improving assay performance.
    • Nucleotide interference can be mitigated by increasing molybdate concentration.

    Conclusions:

    • This phosphomolybdate extraction assay provides a robust method for quantifying purified ATPase activity.
    • The assay is suitable for biochemical and enzymatic studies requiring precise enzyme activity measurements.

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