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Antibodies - A type of protein produced by the body that helps it defend itself against foreign substances called antigens (found in microorganisms like bacteria). Part of the immune system response, antibodies are produced by plasma cells (a type of white blood cell) and released into the blood. Each antibody binds to, and works against, a specific antigen to help destroy it. One type of anticancer antibody, monoclonal antibodies, are used in cancer therapy. Monoclonal antibodies are laboratory-produced substances that work to locate and bind to cancer cells in the body.
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