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[Substrate specificity of sweet almond beta-glucosidase]
Biokhimiia (Moscow, Russia)
|January 1, 1977
Summary
Almond emulsin contains a beta-glucosidase enzyme exhibiting multiple activities, including beta-galactosidase, beta-xylosidase, and alpha-L-arabinosidase. This enzyme is not strictly specific, suggesting a single enzyme may be responsible for these varied glycosidase functions.
Area of Science:
- Enzymology
- Biochemistry
Context:
- Almond emulsin is a rich source of various glycosidase enzymes.
- Understanding enzyme specificity is crucial for biochemical applications.
Purpose:
- To investigate the enzymatic activities of a partially purified almond emulsin preparation.
- To determine the specificity of beta-glucosidase and related enzymes.
Summary:
- Chromatography, electrophoresis, and isoelectric focusing revealed beta-glucosidase exists as two equal molecular weight components.
- Multiple native forms with similar specific activities were observed, likely due to aggregation.
- Separation of beta-glucosidase from beta-galactosidase, beta-xylosidase, and alpha-L-arabinosidase activities was not achieved.
Impact:
- Suggests a single enzyme may be responsible for beta-glucosidase, beta-galactosidase, beta-xylosidase, and alpha-L-arabinosidase activities.
- Highlights the non-specific nature of the enzyme towards hexosides and pentosides.
- Provides insights into enzyme purification and characterization.