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Nonliving substances, for example, poisons, chemicals, drugs, and outside particles can likewise are antigens. The safe framework perceives and demolishes, or tries to annihilate, substances that contain antigens. Your body's cells have proteins that are antigens. Your safe framework has an astonishing capacity to recognize your body's own cells and outside cells. Every phone conveys protein markers called antigens that distinguish it as self or non-self.