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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...
Western Blotting01:15

Western Blotting

Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.

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Fast and Sensitive Colloidal Coomassie G-250 Staining for Proteins in Polyacrylamide Gels
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Role of gel based technique for Coomb's test.

M Jaiprakash1, P K Gupta, Harsh Kumar

  • 1Department of Transfusion Medicine, Armed Forces Medical College, Pune.

Indian Journal of Pathology & Microbiology
|September 28, 2006
PubMed
Summary

Gel technology (GT) offers superior sensitivity and specificity for direct (DAT) and indirect antiglobulin tests (IAT) compared to conventional tube tests (CTT). This makes GT a recommended alternative for routine blood transfusion diagnostics.

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Area of Science:

  • Transfusion Medicine
  • Immunology
  • Clinical Diagnostics

Background:

  • Direct antiglobulin test (DAT) and indirect antiglobulin test (IAT) are crucial for diagnosing immune-mediated disorders.
  • Column technology, specifically gel technology (GT), has been introduced in transfusion laboratories.
  • Comparison between conventional tube tests (CTT) and GT for Coomb's testing is needed.

Purpose of the Study:

  • To compare the performance of gel technology (GT) with conventional tube tests (CTT) for DAT and IAT.
  • To evaluate the sensitivity and specificity of GT versus CTT.

Main Methods:

  • A total of 1656 samples were analyzed.
  • 602 samples were tested for DAT using both CTT and GT.
  • 1054 samples were tested for IAT using both CTT and GT.

Main Results:

  • DAT: GT showed 97.5% concordance with CTT, detecting higher positivity (8.6% vs 6.1%). GT sensitivity was 100%, specificity 97.3%.
  • IAT: GT showed 98.8% concordance with CTT, detecting higher positivity (6.6% vs 5.4%). GT sensitivity was 100%, specificity 97.7%.

Conclusions:

  • Gel technology (GT) is a more sensitive and specific method than conventional tube tests (CTT) for both DAT and IAT.
  • GT is recommended for routine implementation in blood transfusion centers.
  • GT offers improved detection rates for immune-mediated hemolytic anemias.