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Centrifugation

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...

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Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

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Dynamic Measurement Method for Bio-molecular Interactions by Using Centrifugal Force.

Mao Otake¹, Yoshiaki Ukita¹

¹Faculty of Engineering, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry

|October 11, 2019

Summary

This study introduces a novel method using centrifugal force to measure single molecule binding forces, improving efficiency over traditional techniques. The developed approach offers a simpler, faster way to quantify intermolecular interactions, with potential for biosensor development.

Keywords:

Biomolecular interactions centrifugal microfluidic device single-molecule measurement

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Area of Science:

Biophysics
Biochemistry
Analytical Chemistry

Background:

Single molecule interaction measurements are crucial in various scientific fields.
Current micromanipulation techniques are complex, leading to low throughput and extensive statistical analysis.
There is a need for more efficient and accessible methods to measure binding forces.

Purpose of the Study:

To propose and validate a novel method for measuring intermolecular binding forces using centrifugal force.
To simplify the process of quantifying molecular interactions.
To assess the potential of this technique for applications like biosensor development.

Main Methods:

Applying tensile force to intermolecular bonds via centrifugal force.
Measuring the binding force of an antigen-antibody reaction system as a proof of concept.
Comparing results with conventional measurement techniques.

Main Results:

The proposed method successfully measured antigen-antibody binding forces.
Measured binding forces ranged from 19 to 133 picoNewtons (pN).
The results obtained were consistent with those from conventional methods.

Conclusions:

The centrifugal force method provides an accessible and efficient approach for measuring intermolecular binding forces.
This technique shows promise for developing novel biosensors and other applications.
The method overcomes limitations of traditional micromanipulation techniques in terms of speed and complexity.