Western Blotting: A Technique for Detecting Specific Proteins in a Sample
Western blotting is the technique for the detection of
(a) Specific DNA in a sample
(b) Specific RNA in a sample
(c) Specific protein in a sample
(d) Specific glycolipid in a sample
Explanation (Western blotting for protein detection)
Western blotting is a widely used analytical technique in molecular biology and biochemistry for the detection of specific proteins in a complex biological sample. It involves separation, transfer, and identification of proteins using specific antibodies, making it a powerful tool in medical research and diagnostics.
Correct Answer: (c) Specific Protein in a Sample
Among the given options:
- (a) Specific DNA in a sample – Detected using Southern blotting.
- (b) Specific RNA in a sample – Detected using Northern blotting.
- (c) Specific protein in a sample – Detected using Western blotting (Correct Answer).
- (d) Specific glycolipid in a sample – Glycolipids are typically analyzed using specialized lipid analysis techniques.
Steps of Western Blotting
- Protein Separation (SDS-PAGE) – Proteins are separated based on their molecular weight using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE).
- Transfer to Membrane – Separated proteins are transferred onto a nitrocellulose or PVDF membrane for further analysis.
- Blocking – The membrane is blocked with non-fat dry milk or BSA to prevent non-specific binding.
- Antibody Incubation –
- Primary Antibody binds to the target protein.
- Secondary Antibody (linked to an enzyme or fluorophore) binds to the primary antibody.
- Detection – The bound secondary antibody produces a signal, which can be visualized using chemiluminescence, fluorescence, or colorimetric detection methods.
Applications of Western Blotting
- Medical Diagnostics – Used in HIV, Lyme disease, and prion disease testing.
- Cancer Research – Helps detect biomarkers and protein expression levels.
- Molecular Biology Studies – Used for protein quantification and characterization.
Conclusion
Western blotting is a powerful and reliable technique for detecting specific proteins in biological samples. It plays a crucial role in biomedical research, disease diagnostics, and drug development, making it an essential tool in modern science.
78 Comments
Arushi
April 9, 2025👍☑️
Meenakshi Choudhary
August 19, 2025Specific Protein in a Sample
Khushi Vaishnav
August 19, 2025WB – Protein
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August 19, 2025Specific Protein in sample
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August 20, 2025Specific protein in a sample
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August 20, 2025(c) Specific protein in a sample
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August 20, 2025Ans c
Specific Protein in a Sample
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August 22, 2025Option c.
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August 22, 2025Option c is correct
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August 24, 2025Option C
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August 24, 2025OPTION C
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August 25, 2025Option c
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Alec
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August 31, 2025Specific protein in a sample
Shobha Kanwar
August 31, 2025Option (c) Specific Protein in a Sample
Anjali
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