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A thin-layer multistrip agarose gel electrophoresis apparatus for Ferguson plot analysis at the sub-microgram load
L Orbàn1, J V Sullivan, A Chrambach
1Laboratory of Theoretical and Physical Biology, National Institute of Child Health and Human Development, Bethesda, MD 20892.
Journal of Biochemical and Biophysical Methods
|July 1, 1989
Summary
This study introduces a novel method for simultaneous horizontal agarose gel electrophoresis, enabling Ferguson plot analysis at sub-microgram levels. The technique proves effective for analyzing viral RNA, demonstrating independence from field strength and detergent concentration.
Area of Science:
- Biochemistry
- Molecular Biology
- Biophysics
Background:
- Ferguson plots are crucial for analyzing molecular size and charge.
- Existing methods for Ferguson plot generation can be resource-intensive.
- High-sensitivity detection is needed for analyzing small sample quantities.
Purpose of the Study:
- To develop a method for simultaneous horizontal agarose gel electrophoresis on thin-layer strips.
- To enable Ferguson plot generation at sub-microgram load levels.
- To apply the method for analyzing viral RNA.
Main Methods:
- Simultaneous horizontal agarose gel electrophoresis using seven independent gel strips on a common support.
- Utilized a modified commercial apparatus with Peltier cooling and integrated voltage probes.
- Employed an optimized silver staining method for sensitive detection of RNA.
- Applied the technique to analyze turnip crinkle virus (TCV) RNA at 50 ng/gel strip.
Main Results:
- Successfully generated Ferguson plots at the sub-microgram load level.
- Demonstrated that Ferguson plots were independent of field strength (3.5–12.5 V/cm).
- Showed that electrophoretic mobility was independent of CHAPS detergent concentration up to 10 mM.
Conclusions:
- The developed method allows for efficient and simultaneous Ferguson plot analysis.
- The technique is suitable for high-sensitivity analysis of biological macromolecules like viral RNA.
- The findings provide insights into the biophysical properties of TCV RNA.