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Antigen Presentation

The process by which Antigen is presented to Lymphocytes in a form they can recognize. This is performed by Antigen Presenting Cells (APCs). Some Antigens require processing before they can be recognized. Antigen processing consists of ingestion and partial Digestion of the Antigen by the APC, followed by presentation of fragments on the Cell surface. (From Rosen et al., Dictionary of Immunology, 1989)