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Related Concept Videos

Western Blotting01:15

Western Blotting

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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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Band Theory02:35

Band Theory

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When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
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Statistical Software for Data Analysis and Clinical Trials01:12

Statistical Software for Data Analysis and Clinical Trials

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Statistical software is pivotal in data analysis and clinical trials by providing tools to analyze data, draw conclusions, and make predictions. These software packages range from simple data management applications to complex analytical platforms, supporting various statistical tests, models, and simulation techniques. Their significance lies in their ability to handle vast amounts of data with precision and efficiency, enabling researchers to validate hypotheses, identify trends, and make...
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Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

8.4K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
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Energy Bands in Solids01:01

Energy Bands in Solids

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Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
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Related Experiment Video

Updated: Feb 13, 2026

The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis
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A new background subtraction method for Western blot densitometry band quantification through image analysis

Gabriel Gallo-Oller1, Raquel Ordoñez2, Javier Dotor3

  • 1Childhood Cancer Research Unit, Department of Women's and Children's Health, Karolinska Institutet, Astrid Lindgren Children's Hospital, Stockholm, Sweden.

Journal of Immunological Methods
|March 10, 2018
PubMed
Summary

This study presents an affordable method for accurate Western blot quantification using an office scanner and ImageJ software. A novel background subtraction technique enhances protein detection and reproducibility in molecular labs.

Keywords:
Background subtractionDensitometryImageJQuantificationWestern blot

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Western Blotting: Sample Preparation to Detection
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Related Experiment Videos

Last Updated: Feb 13, 2026

The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis
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The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis

Published on: February 5, 2014

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Biotechnology

Background:

  • Western blotting is a fundamental technique for protein detection and quantification in molecular laboratories.
  • Accurate quantification in Western blots is crucial for reproducible scientific results.
  • Limited resources and technical expertise can hinder traditional densitometry analysis.

Purpose of the Study:

  • To describe an accessible and accurate method for Western blot quantification.
  • To introduce a new background subtraction technique for image analysis.
  • To provide a cost-effective solution for protein quantification in resource-limited settings.

Main Methods:

  • Utilizing a standard office scanner for Western blot film imaging.
  • Employing ImageJ software for semi-quantitative analysis.
  • Implementing a novel image background subtraction method.

Main Results:

  • The proposed method provides accurate and reproducible Western blot quantification.
  • Office scanners coupled with ImageJ and the new subtraction method offer a viable alternative to specialized equipment.
  • The technique is suitable for labs with limited financial and technical resources.

Conclusions:

  • An affordable, accurate, and reproducible Western blot quantification method is presented.
  • This approach democratizes protein analysis in molecular biology research.
  • The described technique supports scientific endeavors even with constrained resources.