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Related Concept Videos

Protein Dynamics in Living Cells01:19

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
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Updated: Aug 15, 2025

Automated System for Single Molecule Fluorescence Measurements of Surface-immobilized Biomolecules
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Single-molecule fluorescence methods for protein biomarker analysis.

Haihan He1,2, Chuhong Wu1,2, Muhammad Saqib1,2,3

  • 1Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.

Analytical and Bioanalytical Chemistry
|January 7, 2023
PubMed
Summary
This summary is machine-generated.

Single-molecule protein detection offers ultrasensitive biomarker identification for early disease diagnosis. Fluorescence-based methods provide enhanced accuracy and speed compared to traditional techniques, revolutionizing proteomics research.

Keywords:
Early-stage disease diagnosisProtein biomarker detectionProtein sequencingSingle-molecule fluorescence

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Area of Science:

  • Biochemistry and Molecular Biology
  • Biotechnology
  • Nanotechnology

Background:

  • Proteins are fundamental to life, and their analysis is crucial for understanding diseases and biological processes.
  • Single-molecule protein detection/sequencing promises advancements in clinical proteomics, enabling early disease diagnosis and single-cell analysis.
  • Fluorescence-based methods offer superior signal-to-noise ratios for sensitive protein detection.

Approach:

  • This review summarizes single-molecule detection technologies, detailing methodologies, detection limits, and comparative advantages.
  • It focuses on fluorescence-based techniques, including fluorosequencing, N-terminal amino acid binding, nanopore light sensing, and DNA nanotechnology.
  • The review also discusses current challenges and future perspectives in developing high-performance fluorescence-based sequencing and detection.

Key Points:

  • Single-molecule fluorescence detection surpasses conventional ELISA in sensitivity, speed, accuracy, and throughput.
  • Compared to mass spectrometry (MS) sequencing, fluorescence-based methods offer higher sensitivity for peptide sequencing.
  • Advancements in fluorescent probes, detectors, and image analysis are driving progress in single-molecule protein biomarker detection.

Conclusions:

  • Single-molecule protein detection technologies are poised to revolutionize clinical research and diagnostics.
  • Fluorescence-based approaches are particularly promising due to their inherent sensitivity and specificity.
  • Continued development in this field will unlock new frontiers in molecular medicine and biology.