Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Antigen

An antigen is a natural or synthetic macromolecule, considered as a foreign body by the body, recognised by antibodies or cells in the immune system and capable of generating an immune response. Antigens are at the basis of the adaptive immune response. It is the recognition of the antigen by the immunocompetent cells that activate specific immunity.

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