A double staining method is described which combines immunodetection with sensitive staining of the complete electropherogram on the same membrane. The method is based on the use of Tween 20 as blocking agent, and uses immunogold/silver staining of specific antigens and gold staining of the overall protein pattern with AuroDye. This double staining makes possible the exact location of an immunodetected band within a complex protein pattern.
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