Blood proteins are controlled by genetics and are rather specific for an individual. The best tool for distinguishing blood proteins is electrophoresis. Proteins are electrically charged at a given pH. In the presence of an electric current and at the appropriate pH, the proteins migrate at different rates toward the positive electrode separating into different spots along the way. The spots are stained with ninhydrin, making them visible. Their relative positions are used to identify individual proteins (see Enzymes module).
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