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  • a substance causing the formation of an antibody
    Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
  • Any foreign substance, such as a virus, bacterium, or protein, that elicits an immune response by stimulating the production of antibodies.
  • A foreign substance or protein that, when introduced into the body, is recognised by the immune system.
    Source: Biotechnology Glossary