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An assay for mandelate racemase using high-performance liquid chromatography
S L Bearne1, M St Maurice, M D Vaughan
1Department of Biochemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4H7, Canada.
Analytical Biochemistry
|May 1, 1999
Summary
A new assay quantifies mandelate racemase activity by measuring stereoisomer conversion. This efficient method uses high-performance liquid chromatography for accurate enzyme analysis.
Area of Science:
- Biochemistry
- Enzymology
- Analytical Chemistry
Background:
- Mandelate racemase (EC 5.1.2.2) is crucial for interconverting mandelic acid stereoisomers.
- Accurate quantification of enzyme activity is essential for biochemical research.
Purpose of the Study:
- To develop a novel, fixed-time assay for quantifying mandelate racemase activity.
- To provide an economical and efficient alternative to existing assay methods.
Main Methods:
- Enzymatic conversion of R-mandelate to S-mandelate (or vice versa).
- Separation and detection of substrate and product using isocratic reversed-phase high-performance liquid chromatography (RP-HPLC).
- Utilized a Sumichiral OA-6100 column with absorbance detection.
Main Results:
- Successfully developed and validated a fixed-time assay for mandelate racemase.
- The RP-HPLC method provides reliable separation and quantification of mandelic acid stereoisomers.
- Demonstrated the assay's efficiency and cost-effectiveness compared to other techniques.
Conclusions:
- The developed fixed-time assay is a practical tool for measuring mandelate racemase activity.
- This method offers a valuable alternative for researchers studying mandelate racemase and related enzymes.
- Highlights the utility of RP-HPLC in enzyme activity assays.