Related Experiment Video
Updated: Jan 25, 2026
07:45
Western Blotting: Sample Preparation to Detection
Published on: October 14, 2010
145.4K
A fixation method for the optimisation of western blotting.
Jing Xu1, Hebin Sun1, Guoling Huang1
1College of Basic Medical Sciences, Dalian Medical University, Dalian, 116044, Liaoning, China.
Scientific Reports
|May 2, 2019
Summary
Optimized fixation methods reduce protein loss during western blotting, enhancing sensitivity and reproducibility. This improved technique effectively detects challenging proteins and aids in identifying potential cancer biomarkers.
Area of Science:
- Biochemistry
- Molecular Biology
- Proteomics
Background:
- Western blotting is crucial for protein analysis but suffers from protein loss during membrane incubation and washing.
- This protein loss compromises assay sensitivity and reproducibility.
Purpose of the Study:
- To optimize fixation conditions for immunoblotting and lectin blotting on polyvinylidene difluoride (PVDF) and nitrocellulose membranes.
- To reduce protein loss and enhance detection sensitivity in blotting techniques.
Main Methods:
- Developed a fixation protocol combining organic solvents and heating for electroblotted membranes.
- Applied the optimized method to PVDF and nitrocellulose membranes for western blotting and lectin blotting.
Main Results:
- Significantly reduced protein loss from PVDF membranes.
- Increased lectin blotting intensity by 2.8- to 15-fold and immunoblotting intensity by 1.8- to 16-fold compared to untreated samples.
- Successfully detected difficult-to-analyze proteins like cystic fibrosis transmembrane regulator and hypoxia-inducible factor 1.
Conclusions:
- The optimized fixation method enhances protein detection sensitivity and reproducibility in western and lectin blotting.
- This technique enables effective analysis of challenging proteins with physiological and pathological significance.
- The method shows potential for identifying novel diagnostic markers, such as for prostate cancer.
Related Concept Videos
01:15Western Blotting
20.4K
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.
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.
20.4K
01:03Fixation and Sectioning
7.5K
Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
7.5K
02:57Southern Blot
22.6K
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...
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...
22.6K
01:28Carbon-dioxide Fixation
687
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
687
01:29Methods of Sterilization I: Physical Methods
23.5K
As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
23.5K
03:50The Scientific Method
65.5K
Chemistry is an empirical science. Scientists often pose questions to understand the chemistry in everyday life and seek answers to these questions. To achieve this, scientists follow a definitive series of steps that together make up the Scientific Method. This approach involves making observations, asking questions, building a hypothesis, conducting experiments, analyzing results, and forming a conclusion.
65.5K