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Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE)

Two Dimensional Polyacrylamide gel Electrophoresis (2D-PAGE) is a technique used to separate and identify proteins in a biological sample. It involves two sequential steps - isoelectric focusing and SDS-PAGE - to separate proteins based on their isoelectric point and molecular weight. This allows visualization of up to 1,000s of individual protein spots on the gel. The protein spots can then be analyzed through techniques like mass spectrometry to identify specific proteins. While 2D-PAGE provides high resolution of complex protein mixtures, it has limitations such as a narrow dynamic range and difficulties separating some classes of proteins.

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Gel Electrophoresis•
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Two Dimensional Polyacrylamide gel Electrophoresis (2D-PAGE) Supervised by- Dr. Suhas Sutar Bharat Presented by- IPSITA SAHOO Reg. no- 200705180160 DOMAIN- Genomics And Genetic Engineering
CONTENTS Introduction; 2D PAGE Workflow of 2D PAGE 1D; Isoelectric focusing 2D; SDS-PAGE Visualization of results; staining Advantages vs. Disadvantages Reference
 2D-PAGE stands for Two Dimensional Polyacrylamide gel Electrophoresis  2D-PAGE is a form of gel electrophoresis in which separation and identification of proteins in a sample are done by displacement in 2 dimensions oriented at right angles to one another(orthogonal).  2D-PAGE is a widely used method for the analysis of complex protein mixture extracted from cells, tissues, or other biological samples.  This techniques was first developed by O’Farrell and Klose in 1975.  2D-PAGE is used in 3 sequential steps-
Work flow of 2D
1. 2.
Using 2D-PAGE,100 –1000’s of polypeptides can be analyzed in a single run. The proteins can be separated in pure form from the spots. The spots can be quantified and also analyzed by MS. In this method polypeptides can be probed with antibodies and also they can be tested for post- translational modifications. 2D-PAGE has limited dynamic range. This technique include a large amount of sample handling, less reproducibility. It is also not automated for high throughput analysis. Difficulty to separate low abundance proteins, acidic and basic proteins, very large and very small proteins and hydrophobic proteins. Advantages and Disadvantages
References Beranova-Giorgianni, S. (2003) Proteome analysis by two-dimensional gel electrophoresis and mass spectrometry: strengths and limitations. TrAC Trends in Analytical Chemistry 22(5), 273-281. Stephen J Fey* and Peter Mose Larsen(2001)2D or not 2D. Current Opinion in Chemical Biology 2001, 5:26–33. Wayne F Patton*, Birte Schulenberg and Thomas H Steinberg(2002) Two-dimensional gel electrophoresis; better than a poke in the ICAT?. Current Opinion in Biotechnology, 13:321–328. David E. Garfin(2003)Two-dimensional gel electrophoresis: an overview.Trends in Analytical Chemistry, Vol. 22, No. 5 http://www.weihenstephan.de/blm/deg/manual/manualwork2html02test.htm http://www.aber.ac.uk/parasitology/Proteome/Tut_2D.html
Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE)