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Related Concept Videos

Electrophoresis: Overview01:20

Electrophoresis: Overview

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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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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.
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Capillary Electrophoresis: Instrumentation01:20

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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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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DNA Agarose Gel Electrophoresis02:35

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An Optimized Protocol for Electrophoretic Mobility Shift Assay Using Infrared Fluorescent Dye-labeled Oligonucleotides
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Electrophoretic Mobility Shift Assays.

Sarah E Rowe1, James P O'Gara2

  • 1Antimicrobial Discovery Center, Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA, 02115, USA. s.rowe@neu.edu.

Methods in Molecular Biology (Clifton, N.J.)
|July 22, 2015
PubMed
Summary
This summary is machine-generated.

This study details electrophoretic mobility shift assays (EMSAs) to investigate how transcription factors interact with DNA sequences. These methods help understand gene expression regulation by analyzing protein-DNA binding.

Keywords:
Electrophoretic mobility shift assayGene regulationPromoterTranscription regulator

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Understanding gene expression regulation is crucial in molecular biology.
  • Transcription factors play a key role in controlling gene activity by binding to specific DNA sequences.
  • Electrophoretic mobility shift assays (EMSAs) are essential tools for studying these interactions.

Purpose of the Study:

  • To provide a comprehensive guideline for the expression and purification of recombinant transcription factor proteins.
  • To present a detailed protocol for performing electrophoretic mobility shift assays (EMSAs).
  • To facilitate the study of regulatory protein interactions with gene sequences.

Main Methods:

  • Expression and purification of recombinant transcription factor proteins.
  • Detailed protocol for performing electrophoretic mobility shift assays (EMSAs).
  • Integration of EMSAs with downstream applications like transcriptional analysis.

Main Results:

  • Demonstration of experimental methods for analyzing protein-DNA interactions.
  • Provides a framework for understanding transcription factor binding affinities and specificities.
  • Enables the investigation of how regulatory proteins influence gene expression.

Conclusions:

  • EMSAs are a powerful technique for studying transcription factor binding.
  • Combining EMSAs with other methods enhances the understanding of gene regulation mechanisms.
  • This guideline supports researchers in conducting essential gene expression studies.