Thermophoresis Experiment
Thermophoresis Experiment - Related Videos
03:43
Microscale Thermophoresis to Study Protein-Lipid Interactions in Solution
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2025
This video demonstrates microscale thermophoresis for studying the protein-lipid interaction. The assay detects the interaction between molecules by quantifying the thermophoretic movement of fluorescent-labeled proteins in response to a temperature gradient. The fluorescent molecule is mixed with different concentrations of the non-fluorescent lipid molecules, and the mixture of molecules in the solution is loaded into capillaries. A temperature gradient is applied to the samples in the...
08:09
Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis
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Cited by 12 •
2017
MicroScale Thermophoresis (MST) is a sensitive technology to characterize aptamer-target interactions. This manuscript describes an MST protocol to characterize aptamer-small molecule interactions.
04:45
Use of Microscale Thermophoresis to Measure Protein-Lipid Interactions
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Cited by 12 •
2022
Microscale thermophoresis obtains binding constants quickly at low material cost. Either labeled or label free microscale thermophoresis is commercially available; however, label free thermophoresis is not capable of the diversity of interaction measurements that can be performed using fluorescent labels. We provide a protocol for labeled thermophoresis measurements.
10:22
Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis
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Cited by 54 •
2013
Microscale thermophoresis (MST) can be widely used for determination of binding affinity without purification of the target protein from cell lysates. The protocol involves overexpression of the GFP-fused protein, cell lysis in non-denaturing conditions, and detection of MST signal in the presence of varying concentrations of the ligand.
06:58
The Factorial Experiment
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2023
Source: Laboratories of Gary Lewandowski, Dave Strohmetz, and Natalie Ciarocco—Monmouth University A factorial design is a common type of experiment where there are two or more independent variables. This video demonstrates a 2 x 2 factorial design used to explore how self-awareness and self-esteem may influence the ability to decipher nonverbal signals. This video leads students through the basics of a factorial design including, the nature of a factorial design and what distinguishes it from...
FAQs
A localized temperature gradient changes molecular movement through two linked effects: thermophoresis, which drives movement in response to temperature, and temperature-dependent diffusion, which alters how molecules spread. Microscale thermophoresis observes the combined movement rather than treating either process alone. This distinction helps researchers relate changes in molecular motion to altered molecular states, including those produced by binding.
Fluorescence provides a way to track changes in molecular movement as the sample experiences the laser-generated temperature difference. When molecular recognition changes movement, the measured fluorescence response can indicate an interaction between biomolecules. Researchers can therefore use the signal to study binding involving proteins, nucleic acids, ligands, and other biological molecules without relying only on a visible structural change.
The focused infrared laser creates the localized temperature difference required for the measurement. That gradient supplies the physical stimulus, while fluorescence supplies the observable readout of movement. Together, these components connect a controlled thermal condition with molecular behavior in the sample. Their combination allows interaction measurements at the microscale, where small changes in transport can provide information about molecular recognition.
The experiment considers both thermophoresis and temperature-dependent diffusion when interpreting molecular movement. Ordinary diffusion describes spreading associated with thermal motion, whereas thermophoresis describes movement driven by the temperature gradient. Comparing the fluorescence-tracked response under the localized thermal stimulus helps reveal changes associated with molecular interactions rather than attributing all observed motion to diffusion alone.
A typical workflow places the biological sample in a microscale measurement setting, applies a focused infrared laser to generate a localized temperature gradient, and monitors fluorescence as molecular movement changes. The resulting response is then examined for interaction-related behavior. This workflow requires only small sample volumes and generally involves minimal preparation, making it practical for biomolecular studies.
This approach is useful when researchers need information about interactions among proteins, nucleic acids, ligands, or other biomolecules while conserving sample and limiting preparation. Its measurements can support drug discovery by examining molecular recognition, contribute to diagnostics through interaction data, and help investigate cellular regulation. The same principle therefore connects basic transport measurements with broader biological and biomedical questions.