Western blotting is a widely-used method for identifying a protein of interest on a gel. In Western blotting, following electrophoresis the proteins in the acrylamide gel are all transferred to a membrane (usually a nitrocellulose membrane). The membrane is then soaked in a solution containing antibodies specific for the protein of interest. The antibodies will bind to the protein on the membrane; they will not bind to any other proteins. The antibody can then be detected on the membrane using another probe that is labeled withan enzyme which will produce a colored product on the membrane. The result should be acolored band of the correct size on the membrane.