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Related Experiment Videos

Enzyme immobilization on fibrin.

J G Dillon, C W Wade, W H Daly

    Biotechnology and Bioengineering
    |January 1, 1976
    PubMed
    Summary

    Fibrin effectively immobilizes trypsin, enhancing its stability and allowing for activity measurement. Immobilized enzyme activity is influenced by the amount of enzyme attached and substrate concentration.

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    Area of Science:

    • Biochemistry
    • Biomaterials Science
    • Enzyme Engineering

    Background:

    • Enzyme immobilization is crucial for industrial applications.
    • Fibrin offers a versatile matrix for enzyme attachment.
    • Understanding immobilization effects on enzyme activity and stability is key.

    Purpose of the Study:

    • To investigate fibrin as a matrix for immobilizing trypsin.
    • To assess the impact of fibrin immobilization on trypsin activity, stability, and kinetics.
    • To establish methods for quantifying immobilized enzymes.

    Main Methods:

    • Covalent immobilization of trypsin onto fibrin powder and membranes.
    • Use of Carbon-14 labeled trypsin for quantifying immobilized enzyme.
    • Measurement of esterase activity and TAME hydrolysis.
    • Assessment of storage stability and substrate inhibition.

    Main Results:

    • Fibrin successfully immobilized trypsin with retained activity.
    • Carbon-14 labeling enabled accurate quantification of immobilized enzyme.
    • Enzyme activity was inversely proportional to immobilization levels.
    • Enhanced storage stability of immobilized trypsin was observed.
    • Optimal activity for TAME hydrolysis was at pH 8-8.4.
    • Substrate inhibition occurred above 30mM.

    Conclusions:

    • Fibrin is a suitable matrix for covalent enzyme immobilization.
    • Immobilization affects enzyme kinetics and stability.
    • Quantification methods are essential for characterizing immobilized enzyme systems.

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