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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...
DNA Agarose Gel Electrophoresis02:35

DNA Agarose Gel Electrophoresis

Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
SDS-PAGE01:27

SDS-PAGE

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.
A variation of gel electrophoresis, termed  polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...

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Updated: May 17, 2026

Flow-pattern Guided Fabrication of High-density Barcode Antibody Microarray
09:05

Flow-pattern Guided Fabrication of High-density Barcode Antibody Microarray

Published on: January 6, 2016

Protein array patterning by diffusive gel stamping.

Mekhail Anwar1, Piyush B Gupta, Raja Palaniapan

  • 1Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, United States of America. mekhail@alum.mit.edu

Plos One
|October 17, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed diffusive gel (DiG) stamping, a novel technique for protein microarray analysis. This accessible method uses cellular lysates for rapid visualization of proteome dynamics and protein interactions without specialized equipment or in-vitro synthesis.

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Last Updated: May 17, 2026

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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications
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Published on: September 15, 2017

Area of Science:

  • Proteomics
  • Biotechnology
  • Molecular Biology

Background:

  • Systems-scale proteome characterization demands high-throughput methods for analyzing protein modifications, expression, and interactions in complex biological samples.
  • Current protein microarrays are limited by the extensive requirement for individual synthesis of numerous proteins.
  • There is a need for accessible, efficient techniques to probe dynamic proteome changes and protein interactions.

Purpose of the Study:

  • To introduce and characterize diffusive gel (DiG) stamping, a novel technique for creating protein microarrays from cellular lysates.
  • To demonstrate the utility of DiG-stamping for visualizing dynamic proteome changes and identifying protein interactions.
  • To highlight the accessibility and advantages of DiG-stamping compared to traditional protein microarray methods.

Main Methods:

  • Development and characterization of diffusive gel (DiG) stamping for patterning protein microarrays using cellular lysates.
  • Assessment of DiG-stamping sensitivity and physical features.
  • Integration of DiG-stamping with mass spectrometry for protein interaction discovery.

Main Results:

  • DiG-stamping enables the patterning of microarrays directly from cellular lysates, eliminating the need for in-vitro protein synthesis.
  • The technique allows for the rapid visualization of dynamic changes in the proteome and protein interactions.
  • Demonstrated utility in identifying protein binding partners within cellular lysates and visualizing proteins with post-translational modifications.

Conclusions:

  • DiG-stamping offers a widely accessible and cost-effective alternative for high-throughput proteome analysis.
  • The method facilitates the study of dynamic proteome changes and protein interactions without specialized equipment.
  • DiG-stamping holds potential for advancing proteomic research, including the discovery of novel protein interactions.