Imaging and Analysis of 2-D Electrophoresis Gels

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Overview

After 2-D gels are stained, the protein patterns are digitized and analyzed. Following analysis, spots of interest are then excised from gels for further analysis. Bio-Rad provides a wide assortment of imaging systems to meet various 2-D gel imaging requirements. Sophisticated image analysis software simplifies the analysis of 2-D data and makes the process more efficient by automating spot detection and analysis. This section provides an overview of gel image acquisition instruments and analysis software.

Related Topics: Protein Sample Preparation for 2-D Electrophoresis, First Dimension Separation (Isoelectric Focusing), Second Dimension Separation, Visualization (Staining), Protein Spot Excision and Protein Identification, and Troubleshooting 2-D Electrophoresis Gels with 2-D Doctor™.

 

Image Acquisition Instruments

Analysis of high-quality 2-D gels is a basic requirement for investigating changes in protein expression. Before 2-D gels can be analyzed with an image evaluation system, they must be digitized. The most commonly used devices are camera-based systems, densitometers, phosphor imagers, and fluorescence scanners. Bio-Rad has imaging equipment suitable for different kinds of detection methods.

Imaging Systems

 
  GS-900™
LED illumination
ChemiDoc™ MP Gel Doc™ EZ
Type of Imager Densitometer CCD camera-based CCD camera-based
Light source options Epl- and transillumination of white light Transillumination of UV and white light with near infrared, far red, red, green, and blue LEDs Transillumination of UV and white light
Optimized applications      
Colorimetric stains
UV stains
Fluorescent stains and labels
Fluorescent multiplexing
Chemilluminescence
Stain-Free

 

 

Image Analysis Software

Computer-assisted image analysis is an indispensable tool for the evaluation of complex 2-D gels. Image analysis software obtains quantitative and qualitative information about the proteins in a sample and stores the information in files, which may also contain additional annotations. PDQuest™ 2-D analysis software is a tool for analysis of digitized gel images that integrates with Bio-Rad's image acquisition instruments.

Spot comparison with PDQuest software. PDQuest software can be used to compare two or more gel images, revealing changes in protein expression in response to different treatments, growth conditions or disease states.

 

 

The wizard driven software uses the following work flow:

Imaging Workflow

PDQuest can also be used to control the ExQuest™ spot cutter for automated spot excision.

After separation by 1-D gel electrophoresis, you can utilize a number of methods for protein imaging and analysis involving staining techniques or stain-free technology in combination with specialized imaging devices and accompanying software.

 

Related Content

 
PDQuest Software Tutorial
PDQuest new experiment workflow.
 
PDQuest Software Tutorial
Cropping images for analysis.
 
PDQuest Software Tutorial
Creating analysis sets.
 
Literature
Number Description Download
2651 2-D Electrophoresis Workflow How-To Guide, Rev F Click to download
2566 Normalizing Between 2-D Gels With PDQuest Software Click to download
2629 PDQuest Software Citations, Rev C Click to download
3095 2-D Electrophoresis: Tools for Rapid, High-Resolution Protein Separations Brochure, Rev B Click to download
3096 Sample Preparation: Tools for Protein Sample Extraction, Cleanup, Fractionation, and Depletion Brochure, Rev B Click to download
3097 Imaging and Analysis: Tools for Acquisition and Analysis of Protein Expression Data Brochure, Rev B Click to download
3098 Expression Proteomics Overview Brochure, Rev B Click to download
 
 
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Following analysis, spots of interest are then excised from gels for further analysis. Bio-Rad provides a wide assortment of imaging systems to meet various 2-D gel imaging requirements. Sophisticated image analysis software simplifies the analysis of 2-D data and makes the process more efficient by automating spot detection and analysis. This section provides an overview of gel image acquisition instruments and analysis software.</p> <p><strong>Related Topics:</strong> <a href="/evportal/destination/solutions?catID=LUSQH6HYP">Protein Sample Preparation for 2-D Electrophoresis</a>, <a href="/evportal/destination/solutions?catID=LUSQLK2B7">First Dimension Separation (Isoelectric Focusing)</a>, <a href="/evportal/destination/solutions?catID=LUSQMI97Q">Second Dimension Separation</a>, <a href="/evportal/destination/solutions?catID=LUSQN83Q3">Visualization (Staining)</a>, <a href="/evportal/destination/solutions?catID=LUSQPTOZR">Protein Spot Excision and Protein Identification</a>, and <a href="/evportal/destination/solutions?catID=LUSQQRB9O">Troubleshooting 2-D Electrophoresis Gels with 2-D Doctor&trade;</a>.</p> Image Acquisition Instruments <p>Analysis of high-quality 2-D gels is a basic requirement for investigating changes in protein expression. Before 2-D gels can be analyzed with an image evaluation system, they must be digitized. The most commonly used devices are camera-based systems, densitometers, phosphor imagers, and fluorescence scanners. Bio-Rad has imaging equipment suitable for different kinds of detection methods.</p> <p class="caption"><strong>Imaging Systems</strong></p> <table class="pd_table" border="0"> <tbody> <tr style="border-top: 1px solid #ccc; border-bottom: 1px solid #ccc;"> <td width="225">&nbsp;</td> <td width="149" align="center"><img src="/webroot/web/images/lsr/solutions/technologies/2-D_electrophoresis/2-D_electrophoresis/technology_detail/2DT15_gs800.jpg" border="0" alt="" /></td> <td width="135" align="center"><img src="/webroot/web/images/lsr/solutions/technologies/2-D_electrophoresis/2-D_electrophoresis/technology_detail/2DT15_chemidocmp.jpg" border="0" alt="" /></td> <td width="150" align="center"><img src="/webroot/web/images/lsr/solutions/technologies/2-D_electrophoresis/2-D_electrophoresis/technology_detail/2DT15_geldocez.jpg" border="0" alt="" /></td> </tr> <tr style="border-bottom: 1px solid #ccc;"> <td align="center">&nbsp;</td> <td align="center">GS-900&trade;<br /> LED illumination</td> <td align="center">ChemiDoc&trade; MP</td> <td align="center">Gel Doc&trade; EZ</td> </tr> <tr> <td align="left" valign="top"><strong>Type of Imager</strong></td> <td class="pd_colorbackground" align="left">Densitometer</td> <td align="left">CCD camera-based</td> <td class="pd_colorbackground" align="left">CCD camera-based</td> </tr> <tr style="border-bottom: 1px solid #ccc;"> <td align="left" valign="top"><strong>Light source options</strong></td> <td class="pd_colorbackground" align="left" valign="top">Epl- and transillumination of white light</td> <td align="left" valign="top">Transillumination of UV and white light with near infrared, far red, red, green, and blue LEDs</td> <td class="pd_colorbackground" align="left" valign="top">Transillumination of UV and white light</td> </tr> <tr> <td align="left"><strong>Optimized applications</strong></td> <td class="pd_colorbackground" align="left">&nbsp;</td> <td align="left">&nbsp;</td> <td class="pd_colorbackground" align="left">&nbsp;</td> </tr> <tr> <td align="left">Colorimetric stains</td> <td class="pd_colorbackground" align="center">&bull;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&bull;</td> </tr> <tr> <td align="left">UV stains</td> <td class="pd_colorbackground" align="center">&mdash;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&bull;</td> </tr> <tr> <td align="left">Fluorescent stains and labels</td> <td class="pd_colorbackground" align="center">&mdash;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&mdash;</td> </tr> <tr> <td align="left">Fluorescent multiplexing</td> <td class="pd_colorbackground" align="center">&mdash;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&mdash;</td> </tr> <tr> <td align="left">Chemilluminescence</td> <td class="pd_colorbackground" align="center">&mdash;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&mdash;</td> </tr> <tr style="border-bottom: 1px solid #ccc;"> <td align="left">Stain-Free</td> <td class="pd_colorbackground" align="center">&mdash;</td> <td align="center">&bull;</td> <td class="pd_colorbackground" align="center">&bull;</td> </tr> </tbody> </table> <p>&nbsp;</p> <div class="top"><a href="#helptop">Back to Top</a></div> Image Analysis Software <p><img style="float: right; margin: 20px 0 20px 20px" src="/webroot/web/images/lsr/solutions/technologies/2-D_electrophoresis/2-D_electrophoresis/technology_detail/2dt15_img1.jpg" border="0" alt="" /></p> <p>Computer-assisted image analysis is an indispensable tool for the evaluation of complex 2-D gels. Image analysis software obtains quantitative and qualitative information about the proteins in a sample and stores the information in files, which may also contain additional annotations. <a href="http://www.bio-rad.com/evportal/destination/commerce/product_detail?catID=966deb78-2656-437f-b7a4-ab0a9bd45c8d">PDQuest&trade; 2-D analysis software</a> is a tool for analysis of digitized gel images that integrates with Bio-Rad's image acquisition instruments.</p> <p class="caption" style="float: right; margin: 0px 20px 5px 305px"><strong>Spot comparison with PDQuest software.</strong> PDQuest software can be used to compare two or more gel images, revealing changes in protein expression in response to different treatments, growth conditions or disease states.</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>The wizard driven software uses the following work flow:</p> <p><img src="/webroot/web/images/lsr/solutions/technologies/2-D_electrophoresis/2-D_electrophoresis/technology_detail/2dt15_img2.gif" alt="Imaging Workflow" width="597px" height="42px" /></p> <p>PDQuest can also be used to control the ExQuest&trade; spot cutter for automated spot excision.</p> <p>After separation by 1-D gel electrophoresis, you can <a href="/evportal/destination/solutions?catID=LUSQC6MNI">utilize a number of methods for protein imaging and analysis</a> involving staining techniques or <a href="/evportal/destination/solutions?catID=LUSPMPE8Z#3">stain-free technology</a> in combination with specialized imaging devices and accompanying software.</p> <div class="top"><a href="#helptop">Back to Top</a></div> <div class="videowrap"> <div class="videoImg"><a title="PDQuest New Experiment Workflow" onclick="javascript:openElementOverlay('pdqNewExpwf');" href="javascript:void(0);"><img style="width: 88px; height: 51px; border: 0px none;" src="/webroot/web/images/lsr/support/tutorials/global/ov_pdquest1.jpg" alt="" /></a></div> <div class="videoDesc"><a title="PDQuest New Experiment Workflow" onclick="javascript:openElementOverlay('pdqNewExpwf');" href="javascript:void(0);">PDQuest Software Tutorial</a> <br />PDQuest new experiment workflow.</div> <div class="clear">&nbsp;</div> </div> <div id="pdqNewExpwf" style="display: none;"> <div class="overlay_contents" style="height: 383px;"> <div class="overlay-head">PDQuest&trade; Software Tutorial</div> <iframe src="http://www.youtube.com/embed/QOTS209DAgk?version=3&amp;rel=0&amp;showinfo=0&amp;theme=light&amp;modestbranding=1&amp;fs=1;wmode=transparent" width="620" height="376"></iframe></div> </div> <div class="videowrap"> <div class="videoImg"><a title="Cropping Images for Analaysis" onclick="javascript:openElementOverlay('pdqCrop');" href="javascript:void(0);"><img style="width: 88px; height: 51px; border: 0px none;" src="/webroot/web/images/lsr/support/tutorials/global/ov_pdquest2.jpg" alt="" /></a></div> <div class="videoDesc"><a title="PDQuest Software Tutorial" onclick="javascript:openElementOverlay('pdqCrop');" href="javascript:void(0);">PDQuest Software Tutorial</a> <br />Cropping images for analysis.</div> <div class="clear">&nbsp;</div> </div> <div id="pdqCrop" style="display: none;"> <div class="overlay_contents" style="height: 383px;"> <div class="overlay-head">PDQuest&trade; Software Tutorial</div> <iframe src="http://www.youtube.com/embed/PenWNwHBPuY?version=3&amp;rel=0&amp;showinfo=0&amp;theme=light&amp;modestbranding=1&amp;fs=1;wmode=transparent" width="620" height="376"></iframe></div> </div> <div class="videowrap vwrap_last"> <div class="videoImg"><a title="Creating Analysis Sets" onclick="javascript:openElementOverlay('pdqCreate');" href="javascript:void(0);"><img style="width: 88px; height: 51px; border: 0px none;" src="/webroot/web/images/lsr/support/tutorials/global/ov_pdquest5.jpg" alt="" /></a></div> <div class="videoDesc"><a title="Creating Analysis Sets" onclick="javascript:openElementOverlay('pdqCreate');" href="javascript:void(0);">PDQuest Software Tutorial</a> <br />Creating analysis sets.</div> <div class="clear">&nbsp;</div> </div> <div id="pdqCreate" style="display: none;"> <div class="overlay_contents" style="height: 383px;"> <div class="overlay-head">PDQuest&trade; Software Tutorial</div> <iframe src="http://www.youtube.com/embed/SXKSyAcfBmY?version=3&amp;rel=0&amp;showinfo=0&amp;theme=light&amp;modestbranding=1&amp;fs=1;wmode=transparent" width="620" height="376"></iframe></div> </div> 3907 2651 2566 2629 3095 3096 3097 3098 Life Science Research/Products/Imaging Instruments &amp; Bioinformatics/Spot Cutting/EXQuest Spot Cutter ->MT::d3f27dd1-a47f-4fb7-9ffd-a3bdf436ea02##Life Science Research/Products/Imaging Instruments &amp; Bioinformatics/Molecular Imager Systems/PharosFX Systems ->MT::7aa4ba03-1b00-4a92-ae2b-6c1e2ac55105##Life Science Research/Products/Electrophoresis and Blotting/Protein Electrophoresis and Blotting/Protein Stains/Coomassie Stains ->MT::2ef88af8-1ca6-44ef-9702-3ebcfe0ad35b##Life Science Research/Products/Electrophoresis and Blotting/Protein Electrophoresis and Blotting/Protein Stains/Fluorescent Stains ->MT::cb886820-1f6e-447f-8ef6-772fd81c29e3##Life Science Research/Products/Imaging Instruments &amp; 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