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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

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.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...

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Related Experiment Video

Updated: Jun 18, 2026

Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
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Rapid Biosensing Method for Detecting Protein-DNA Interactions.

Shira Roth1, Diana Ideses2, Tamar Juven-Gershon2

  • 1Faculty of Engineering, The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb Street, Ramat Gan 5290002, Israel.

ACS Sensors
|January 3, 2022
PubMed
Summary
This summary is machine-generated.

A new magnetic modulation biosensing (MMB) system rapidly and accurately detects protein-DNA interactions. This cost-effective method offers a significant improvement over current laborious techniques for biomedical research.

Keywords:
Buttonheadbiosensorselectrophoretic mobility shift assaymagnetic modulation biosensingprotein−DNA interactionsspecificity protein 1transcription factor

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Biotechnology

Background:

  • Protein-DNA interactions are crucial in biological processes, yet current detection methods are inefficient.
  • Existing techniques are often time-consuming, labor-intensive, and prone to errors like nonspecific binding and low sensitivity.

Purpose of the Study:

  • To develop and validate a novel Magnetic Modulation Biosensing (MMB) system for efficient protein-DNA interaction detection.
  • To overcome the limitations of traditional methods in terms of speed, sensitivity, and cost.

Main Methods:

  • Immobilized one interacting element (protein or DNA) on magnetic beads and the other on a fluorescent molecule.
  • Utilized magnetic forces for bead manipulation and laser detection of binding events.
  • Assessed specificity using mutated DNA sequences and competition assays.

Main Results:

  • Successfully detected protein-DNA interactions between GC-rich DNA and Sp1/BTD proteins using the MMB system.
  • MMB assay demonstrated a turnaround time of approximately 2 hours, significantly faster than the 4-72 hours for electrophoretic mobility shift assays.
  • Provided unambiguous and quantitative results, outperforming traditional methods.

Conclusions:

  • The MMB system offers a rapid, sensitive, and cost-effective alternative for analyzing protein-DNA interactions.
  • This technique has the potential to significantly advance biomedical research by improving the detection of these vital molecular interactions.