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Related Concept Videos

DNA Isolation01:24

DNA Isolation

DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
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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DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition
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A universal DNA-based protein detection system.

Thua N N Tran1, Jinhui Cui, Mark R Hartman

  • 1Department of Biological & Environmental Engineering, ∥Department of Molecular Biology and Genetics, and ⊥Kavli Institute at Cornell for Nanoscale Science, Cornell University , Ithaca, New York 14853, United States.

Journal of the American Chemical Society
|August 28, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel DNA-based system for protein detection, eliminating the need for secondary antibodies. This versatile platform enhances protein detection methods with modularity and high capacity.

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Area of Science:

  • Biotechnology
  • Immunodetection
  • Molecular Biology

Background:

  • Protein detection often relies on secondary antibodies, leading to challenges with interspecies cross-reactivity and limited primary/secondary antibody pair availability.
  • Current methods for protein immune detection are restricted by the need for specific secondary antibodies, complicating assay development and limiting flexibility.

Purpose of the Study:

  • To develop a versatile, antibody-independent DNA-based system for protein detection.
  • To overcome the limitations of secondary antibody selection in protein immune detection assays.
  • To create a novel platform for high-capacity, multiplexed protein detection.

Main Methods:

  • A universal adapter was designed to link IgG antibodies with DNA-modified reporter molecules.
  • The system was demonstrated using DNA nano-barcodes, quantum dots, and horseradish peroxidase as reporters.
  • Multiple proteins were detected using this DNA-based labeling strategy.

Main Results:

  • Successful implementation of a DNA-based protein detection system that bypasses the need for secondary antibodies.
  • Demonstrated detection of multiple proteins using DNA nano-barcodes, quantum dots, and horseradish peroxidase.
  • Validated the system's capability for modularity, high capacity, and multiplexed detection.

Conclusions:

  • The developed DNA-based system offers a versatile alternative to traditional secondary antibody-dependent protein detection.
  • This novel method platform provides enhanced modularity, high capacity, and multiplexed capabilities for protein detection.
  • The system eliminates interspecies cross-reactivity issues associated with secondary antibodies, broadening detection possibilities.