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Published on: November 5, 2010
DABA Fluorescence Assay for Submicrogram Amounts of DNA.
1Department of Biology, University of Utah, Salt Lake City, Utah.
Methods in Molecular Biology (Clifton, N.J.)
|March 5, 2011
Summary
This study details a fluorescence assay for quantifying deoxypurine nucleosides. The method uses diaminobenzoic acid (DABA) to detect deoxyribose, offering a sensitive DNA quantification technique without prior purification.
Area of Science:
- Biochemistry
- Analytical Chemistry
Background:
- Deoxypurine nucleosides are crucial biomarkers in biological samples.
- Accurate quantification of DNA requires sensitive and specific analytical methods.
Purpose of the Study:
- To present a simplified fluorescence assay for quantifying deoxypurine nucleosides in crude mixtures.
- To establish a sensitive method for DNA quantification applicable to mammalian cell extracts.
Main Methods:
- Utilizes acid-catalyzed depurination of DNA to expose deoxyribose.
- Employs diaminobenzoic acid (DABA) for reaction with deoxyribose to form a fluorescent compound.
- Requires a visible-light fluorometer with excitation near 410 nm and emission near 510 nm.
Main Results:
- The assay quantifies deoxypurine nucleosides in crude mixtures without purification.
- RNA does not interfere with the assay.
- The method is sensitive down to 30 ng of DNA, with potential for increased sensitivity.
Conclusions:
- The described fluorescence assay provides a sensitive and direct method for DNA quantification.
- The assay's simplicity and lack of requirement for purification make it a valuable tool in biochemical analysis.
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