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Related Concept Videos

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.
Southern Blot02:57

Southern Blot

Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...

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Related Experiment Video

Updated: May 9, 2026

Western Blotting: Sample Preparation to Detection
07:45

Western Blotting: Sample Preparation to Detection

Published on: October 14, 2010

Western blots.

Lita A Freeman1

  • 1Cardiovascular & Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.

Methods in Molecular Biology (Clifton, N.J.)
|August 6, 2013
PubMed
Summary
This summary is machine-generated.

This study presents a Western blotting method effective for analyzing apolipoproteins and lipoprotein particles, overcoming challenges like size and hydrophobicity. The optimized technique enables reliable detection of various proteins and intact LDL or HDL particles.

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Western Blotting: Sample Preparation to Detection
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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cardiovascular Research

Background:

  • Western blotting for apolipoproteins and lipoproteins is challenging due to protein characteristics like size, hydrophobicity, and low abundance.
  • Existing methods may not adequately address the complexities of analyzing these crucial molecules involved in lipoprotein metabolism.

Purpose of the Study:

  • To develop and validate a robust Western blotting protocol for the analysis of apolipoproteins, lipoproteins, and related proteins.
  • To provide a reliable method for detecting both individual proteins and intact lipoprotein particles (LDL, HDL).

Main Methods:

  • Proteins or lipoprotein particles are separated by gel electrophoresis and transferred to a PVDF membrane using Tris-Glycine-SDS-Methanol buffer.
  • Blocking with BSA/milk prevents nonspecific binding, followed by incubation with specific primary and HRP-labeled secondary antibodies.
  • Chemiluminescent detection using an HRP substrate allows visualization of the target protein or particle on film or an imaging device.

Main Results:

  • The described Western blotting method successfully analyzes a wide range of proteins involved in lipoprotein metabolism, including apoA-I, apoB, and ABCA1.
  • The protocol is effective for detecting intact low-density lipoprotein (LDL) and high-density lipoprotein (HDL) particles.
  • Successful application demonstrated for numerous human antibodies targeting specific proteins like apoC-II, apoM, PON1, and LCAT.

Conclusions:

  • This optimized Western blotting technique provides a versatile and reliable solution for studying proteins and particles in lipoprotein metabolism.
  • The method overcomes common challenges, enabling accurate analysis of even hydrophobic or low-abundance targets.
  • It is applicable to virtually any protein and native lipoprotein particles, offering broad utility in research.