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Labeling DNA Probes

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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A Polyaniline-based Sensor of Nucleic Acids

A Polyaniline-based Sensor of Nucleic Acids

Published on: November 1, 2016

Visual optical biosensors based on DNA-functionalized polyacrylamide hydrogels.

Imran Khimji¹, Erin Y Kelly, Youssef Helwa

¹Department of Chemistry and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.

Methods (San Diego, Calif.)

|August 28, 2013

Summary

This summary is machine-generated.

DNA aptamer technology integrated with hydrogels creates advanced biosensors for visual detection. This approach enables high DNA loading and sensitive detection of various targets, offering a promising platform for new diagnostic tools.

Keywords:

Aptamers Biosensors DNA Fluorescence Hydrogels

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Area of Science:

Biotechnology
Materials Science
Analytical Chemistry

Background:

Biosensors utilize biomolecular interactions for analytical information.
DNA aptamers offer versatile molecular recognition capabilities.
Hydrogels provide a 3D matrix for high-capacity biosensor immobilization.

Purpose of the Study:

To summarize recent advancements in DNA-functionalized hydrogel biosensors.
To highlight visual detection applications.
To provide methods for DNA biosensor immobilization in hydrogels.

Main Methods:

DNA aptamer immobilization within hydrogel matrices.
Development of monolithic polyacrylamide gels and gel microparticles.
Utilizing hydrogel properties for visual detection.

Main Results:

High DNA loading capacity achieved through 3D immobilization.
Transparent hydrogels offer low optical background for sensitive detection.
Environmental parameters influence hydrogel volume, enabling tunable responses.

Conclusions:

DNA-functionalized hydrogel biosensors represent a significant advancement in visual detection technology.
The described immobilization methods facilitate the development of robust and sensitive biosensing platforms.
This technology holds potential for diverse diagnostic and analytical applications.