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Related Concept Videos

Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
08:59

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Published on: September 27, 2019

Multimodal characterization of a linear DNA-based nanostructure.

Susan Buckhout-White1, Mario Ancona, Eunkeu Oh

  • 1Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States.

ACS Nano
|January 20, 2012
PubMed
Summary

Characterizing designer DNA nanostructures using multiple techniques is feasible and informative. Combining methods like microscopy and spectroscopy provides corroborative data for nanoscale architecture analysis.

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Area of Science:

  • Nanotechnology
  • Biochemistry
  • Materials Science

Background:

  • Designer DNA structures enable precise nanoscale assembly of molecules and nanoparticles.
  • Applications in light-harvesting, molecular electronics, and biosensing depend on realizing functionalized nanoarchitectures.
  • Characterization of these nanostructures is crucial but challenging due to diverse analytical techniques.

Purpose of the Study:

  • To assess the feasibility and informativeness of multimodal characterization for DNA nanostructures.
  • To investigate potential concerns regarding combined use of various analytical methods.
  • To evaluate the corroborative and complementary nature of data from different techniques.

Main Methods:

  • A linear 100 base-pair double-stranded DNA nanostructure was functionalized with various labels (dyes, quantum dots, gold nanoparticles, electroactive labels).
  • A suite of characterization techniques was employed, including electrophoresis, atomic force microscopy (AFM), transmission electron microscopy (TEM), dynamic light scattering (DLS), Förster resonance energy transfer (FRET), and voltammetry.
  • Structural modeling was also utilized to complement experimental data.

Main Results:

  • Multimodal characterization of the DNA nanostructure yielded largely corroborative data across different techniques.
  • Observed differences among techniques were not prohibitive for combined use and offered valuable insights.
  • The study demonstrated the effectiveness of integrating diverse physical and optical methods for comprehensive analysis.

Conclusions:

  • Combining multiple characterization techniques for DNA nanostructures is effective and provides complementary information.
  • This integrated approach enhances the understanding and reliability of nanoscale architecture analysis.
  • Multimodal characterization is key to unlocking the full potential of designer DNA nanostructures for advanced applications.