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Related Concept Videos

Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Chirality in Nature02:30

Chirality in Nature

Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid. The...

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A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis
14:53

A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis

Published on: September 10, 2014

A human telomeric DNA-based chiral biosensor.

Lingyan Feng1, Bailu Xu, Jinsong Ren

  • 1Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, Jilin 130022, China.

Chemical Communications (Cambridge, England)
|August 7, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces an electrochemical DNA (E-DNA) sensor for distinguishing chiral metallo-supramolecular enantiomers. The sensor utilizes specific G-quadruplex formation, offering a reusable and highly enantioselective assay.

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Materials Science

Background:

  • Chiral recognition is crucial in pharmaceuticals and biochemistry.
  • Metallo-supramolecular enantiomers present challenges for selective detection.
  • G-quadruplex structures in DNA are involved in various biological processes.

Purpose of the Study:

  • To develop a novel electrochemical DNA (E-DNA) sensor.
  • To achieve enantioselective detection of zinc-finger like metallo-supramolecular enantiomers.
  • To leverage G-quadruplex formation for chiral sensing.

Main Methods:

  • Fabrication of an E-DNA chiral sensor.
  • Utilizing the specific induction of human telomeric G-quadruplex by one enantiomer.
  • Electrochemical detection and analysis of enantiomeric interactions.

Main Results:

  • The developed sensor successfully distinguished between metallo-supramolecular enantiomers.
  • Enantioselective recognition ratio exceeding 5 was achieved.
  • The assay demonstrated ease of operation and reusability.

Conclusions:

  • The E-DNA sensor provides an effective method for chiral discrimination.
  • G-quadruplex formation is a viable mechanism for enantioselective electrochemical sensing.
  • This approach offers a promising tool for analyzing chiral supramolecular structures.