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Updated: Jun 1, 2026
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Proteome-wide Quantification of Labeling Homogeneity at the Single Molecule Level
Published on: April 19, 2019
High-throughput multispot single-molecule spectroscopy.
Ryan A Colyer1, Giuseppe Scalia, Taiho Kim
1Department of Chemistry & Biochemistry, UCLA, Los Angeles, CA.
Summary
This study introduces a faster method for single-molecule spectroscopy and fluorescence correlation spectroscopy (FCS) using parallelized multispot excitation and detection. This approach significantly reduces acquisition times for molecular property analysis.
Area of Science:
- Biophysical Chemistry
- Spectroscopy
- Nanotechnology
Background:
- Solution-based single-molecule spectroscopy and fluorescence correlation spectroscopy (FCS) are vital for determining molecular properties.
- Current limitations include low concentrations and long acquisition times for statistical accuracy.
Purpose of the Study:
- To develop a parallelized approach for faster data acquisition in single-molecule spectroscopy and FCS.
- To overcome the limitations of low concentrations and lengthy measurement durations.
Main Methods:
- Utilized a multispot excitation and detection geometry.
- Employed a liquid crystal spatial light modulator for multiple excitation spots.
- Integrated a multipixel detector array and a reconfigurable multichannel counting board.
Main Results:
- Demonstrated a novel multispot excitation and detection system.
- Successfully performed fluorescence correlation spectroscopy (FCS) measurements on calibrated samples.
- Acquired single-molecule burst data efficiently.
Conclusions:
- The developed multispot technique enables rapid data acquisition in single-molecule spectroscopy and FCS.
- This parallelized approach enhances efficiency for analyzing molecular properties.
- The system offers a promising advancement for biophysical studies.
