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Updated: May 13, 2026

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Label-free biosensing with single-molecule force spectroscopy.

Gang Wei¹, Sascha Steckbeck, Susan Köppen

¹Hybrid Materials Interfaces Group, Faculty of Production Engineering, University of Bremen, D-28359 Bremen, Germany. wei@uni-bremen.de

Chemical Communications (Cambridge, England)

|March 15, 2013

Summary

This summary is machine-generated.

This study introduces a new label-free biosensing system for detecting specific DNA sequences and proteins. The system achieves high sensitivity, detecting DNA at 1 nM and Lysozyme at 0.65 nM concentrations.

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Area of Science:

Biotechnology
Analytical Chemistry
Molecular Biology

Background:

Accurate detection of specific nucleic acid sequences and proteins is crucial for diagnostics and research.
Existing methods often require labeling or are limited in sensitivity and selectivity.

Purpose of the Study:

To develop and demonstrate a novel single-molecule, label-free bioanalytical system.
To achieve high selectivity and sensitivity in detecting specific single-stranded DNA (ssDNA) oligomer sequences and proteins.

Main Methods:

Utilized a single-molecule detection platform.
Employed a label-free approach to avoid interference from labeling agents.
Optimized the system for high specificity towards target ssDNA and proteins.

Main Results:

Successfully demonstrated the capability to sense specific ssDNA oligomer sequences.
Achieved sensitive detection of proteins.
Detected ssDNA at a concentration of 1 nM.
Detected Lysozyme (Lyz) at a concentration of 0.65 nM, showcasing high sensitivity.

Conclusions:

The developed system offers a promising label-free, single-molecule approach for bioanalysis.
The system exhibits high selectivity and sensitivity for detecting target biomolecules.
Potential applications in diagnostics, drug discovery, and fundamental biological research.