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Protein Dynamics in Living Cells

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Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Related Experiment Video

Updated: Jun 14, 2026

Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

Probing cellular events, one quantum dot at a time.

Fabien Pinaud¹, Samuel Clarke, Assa Sittner

¹Laboratoire Kastler Brossel, CNRS Unité de recherche 8552, Physics and Biology Department, Ecole normale supérieure, Université Pierre et Marie Curie, Paris 6, Paris, France.

|April 1, 2010

Summary

This summary is machine-generated.

Semiconductor quantum dots (QDs) enable precise monitoring of single molecules in live cells. This review highlights advances in QD tracking for deciphering complex cellular processes like membrane dynamics and signaling.

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Production and Targeting of Monovalent Quantum Dots

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Area of Science:

Biophysics
Cell Biology
Nanotechnology

Background:

Single-molecule monitoring provides deep insights into cellular processes.
Semiconductor quantum dots (QDs) offer unique optical, chemical, and biofunctional properties for biological imaging.

Purpose of the Study:

To review recent advancements in single quantum dot (QD) tracking for live-cell experiments.
To illustrate the application of QD probes in understanding cellular dynamics.

Main Methods:

Single-nanoparticle level experiments in live cells.
Utilizing semiconductor quantum dots (QDs) as fluorescent probes.
Tracking of individual QDs to analyze molecular behavior.

Main Results:

Advances allow for more controlled single-nanoparticle experiments in vivo.
QD tracking reveals details of membrane dynamics, cell signaling, and intracellular transport.
Demonstrates the utility of QDs in deciphering complex biological mechanisms.

Conclusions:

Single QD tracking is a powerful technique for investigating cellular organization and dynamics.
Quantum dots are versatile tools for advancing live-cell microscopy and biological research.
This approach facilitates a deeper understanding of fundamental cellular processes.