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Related Concept Videos

Patch Clamp01:18

Patch Clamp

6.0K
Many fundamental cell functions such as muscle contraction and nerve transmission rely on the electrical signals produced by the movement of positively and negatively charged ions across the cell membrane. One competent method to record current flowing across the whole cell or single ion channel is the patch-clamp technique.
In this method, a glass micropipette containing electrolyte solution is tightly sealed against a small portion of the cell membrane. As a result, a patch of the cell...
6.0K
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Related Experiment Video

Updated: May 1, 2026

Single-Cell Optical Action Potential Measurement in Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes
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Patch-clamp fluorometry: electrophysiology meets fluorescence.

Jana Kusch1, Giovanni Zifarelli2

  • 1Universitätsklinikum Jena, Institut für Physiologie II, Jena, Germany.

Biophysical Journal
|March 25, 2014
PubMed
Summary

Patch-clamp fluorometry links ion channel structure and function over time. This technique combines spectroscopy and electrophysiology, advancing our understanding of ion channel biophysics.

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Membrane Protein Dynamics

Background:

  • Ion channels and transporters are crucial membrane proteins.
  • Their function relies on dynamic conformational changes.
  • Classical methods often study structure or function separately.

Purpose of the Study:

  • To review the patch-clamp fluorometry technique.
  • To highlight its ability to correlate structure and function.
  • To showcase its utility in ion channel research.

Main Methods:

  • Combines patch-clamp electrophysiology with spectroscopic methods.
  • Simultaneously measures ionic currents and protein conformational changes.
  • Utilizes various spectroscopic approaches and electrophysiological configurations.

Main Results:

  • Patch-clamp fluorometry provides simultaneous insights into structure and function.
  • The technique has been applied to diverse ion channel families.
  • It has led to significant advances in ion channel biophysics.

Conclusions:

  • Patch-clamp fluorometry is a powerful and flexible technique.
  • It is essential for understanding ion channel mechanisms.
  • It holds great potential for future biophysical research.