Western blotting is an analytical technique used to identify specific proteins or peptides from biological samples or solutions containing complex mixtures.

The proteins are linearised and separated by size using gel electrophoresis. They are then transferred to a membrane that immobilises the protein.
The membrane is blocked and then probed with a primary antibody directed against the protein of interest, which is subsequently detected by a secondary antibody conjugate, allowing the analyte to be visualised.
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Western Blotting Guide Parts
Part 1: Introduction and Sample Preparation
Part 2: Protein Separation by SDS-PAGE
Part 3: Electroblotting – Protein Transfer
Part 4: Membrane Blocking
Part 5: Primary Antibodies
Part 6: Secondary Antibodies
Part 7: Membrane Washing
Part 8: Visualisation
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