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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

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Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
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Electrophoresis: Overview01:20

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Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
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Capillary Electrophoresis: Applications01:30

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
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SDS-PAGE01:27

SDS-PAGE

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Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
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Electrospray Ionization (ESI) Mass Spectrometry01:12

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments
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Assessing 2D electrophoretic mobility spectroscopy (2D MOSY) for analytical applications.

Yuan Fang1, Pavel V Yushmanov2, István Furó1

  • 1Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, SE-10044, Stockholm, Sweden.

Magnetic Resonance in Chemistry : MRC
|December 9, 2016
PubMed
Summary

Two-dimensional mobility spectroscopy (2D MOSY) offers superior chemical selectivity over 2D diffusion-ordered spectroscopy (DOSY) for analyzing complex mixtures. This NMR technique

Keywords:
1H2D DOSY NMRLC-NMRNMRacidbaseelectrophoretic NMRelectrophoretic mobilityionself-diffusion

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Nuclear Magnetic Resonance (NMR)

Background:

  • Electrophoretic NMR experiments utilize phase modulation for spectral analysis.
  • Two-dimensional Fourier Transform (2D FT) converts these modulations into 2D mobility spectroscopy (MOSY) spectra.
  • Understanding chemical composition in complex mixtures is crucial for various scientific fields.

Purpose of the Study:

  • To compare the chemical selectivity of 2D MOSY with 2D diffusion-ordered spectroscopy (DOSY).
  • To evaluate 2D MOSY performance against related Liquid Chromatography-NMR (LC-NMR) methods.
  • To explore the influence of sample pH on 2D MOSY spectral characteristics.

Main Methods:

  • Electrophoretic NMR experiments were conducted.
  • Two-dimensional Fourier Transform (2D FT) was applied to generate 2D MOSY spectra.
  • Comparative analysis was performed using mixed solutions, varying pH conditions.

Main Results:

  • 2D MOSY demonstrated superior chemical selectivity compared to 2D DOSY in mixed solutions.
  • 2D MOSY performance was favorably compared to LC-NMR techniques.
  • The shape of 2D MOSY spectra was significantly influenced by sample pH.

Conclusions:

  • 2D MOSY is a powerful NMR technique offering enhanced chemical selectivity for complex mixture analysis.
  • The pH-dependent spectral modulation of 2D MOSY presents opportunities in drug discovery and metabolomics.
  • 2D MOSY provides a valuable alternative to existing separation and spectroscopic methods.