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Partial purification of a thylakoid-bound enzyme using temperature-induced phase partitioning
A Sánchez-Ferrer1, R Bru, F García-Carmona
1Departamento de Bioquímica, Facultad de Biología, Universidad de Murcia, Spain.
Analytical Biochemistry
|February 1, 1990
Summary
A new method using Triton X-114 partially purified broad bean polyphenol oxidase, achieving high recovery. The activated enzyme showed significantly higher activity compared to other purification techniques.
Area of Science:
- Plant Biochemistry
- Enzymology
- Thylakoid Membrane Proteins
Background:
- Polyphenol oxidase is a key enzyme in plant biochemistry.
- Its purification from thylakoid membranes presents challenges.
- Latent forms of the enzyme are often encountered.
Purpose of the Study:
- To develop an efficient partial purification method for broad bean polyphenol oxidase.
- To investigate the activation of the latent enzyme.
- To characterize the kinetic parameters of the purified enzyme.
Main Methods:
- Partial purification of broad bean polyphenol oxidase using Triton X-114.
- Isolation of the enzyme in a latent form, free of phenolic compounds and chlorophylls.
- Enzyme activation using detergents and trypsin.
Main Results:
- High recovery rate of latent polyphenol oxidase achieved.
- Detergent or trypsin activation resulted in a 10-fold increase in enzyme activity compared to other methods.
- Kinetic parameters for both latent and activated forms were determined.
Conclusions:
- Triton X-114 is effective for partial purification of latent broad bean polyphenol oxidase.
- The activated enzyme exhibits significantly enhanced activity.
- This method offers an improved approach for studying polyphenol oxidase in plants.