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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

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 as  cells...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

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High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
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High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis

Published on: October 15, 2019

Improved instrumentation for large-size two-dimensional protein maps.

Renato Millioni1, Manuela Miuzzo, Lucia Puricelli

  • 1Department of Clinical and Experimental Medicine, Chair of Metabolism, University of Padova, Padova, Italy. millionirenato@gmail.com

Electrophoresis
|November 16, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces new equipment for large-scale 2-D mapping, enabling precise control over isoelectric focusing (IEF) and electrophoresis. The advanced instrumentation supports longer strips and variable temperature for enhanced protein separation and analysis.

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Area of Science:

  • Proteomics
  • Biophysical Chemistry
  • Analytical Chemistry

Background:

  • Two-dimensional (2-D) mapping is crucial for complex biological sample analysis.
  • Existing instrumentation often limits the size and resolution of 2-D maps.
  • Need for adaptable systems capable of handling large-format separation media.

Purpose of the Study:

  • To develop and present novel instrumentation for large-size (>25 cm) 2-D mapping.
  • To enable high-resolution separation of proteins using isoelectric focusing (IEF) and electrophoresis.
  • To provide precise control over experimental parameters for reproducible results.

Main Methods:

  • Development of a high-voltage power supply (15,000 V, 200 μA) for individual Immobilized pH Gradient (IPG) strip focusing.
  • Design of an IEF strip tray accommodating up to 12 IPG strips of variable lengths (up to 45 cm).
  • Integration of a second power supply for high-amperage electrophoresis (400 mA) and a Peltier system for temperature control (10-80°C).

Main Results:

  • Successful implementation of instrumentation for large-format 2-D mapping.
  • Demonstrated precise current regulation for individual IPG strips.
  • Capability to perform electrophoresis at high amperage with accurate temperature control.

Conclusions:

  • The novel instrumentation facilitates large-scale 2-D protein mapping with enhanced precision.
  • The system's adaptability and control features advance proteomic analysis capabilities.
  • This technology offers a robust platform for high-throughput and high-resolution separation.