The process of antigen presentation involves several steps: 1. Antigen Uptake: APCs capture antigens through phagocytosis or endocytosis. 2. Antigen Processing: The antigens are degraded into peptide fragments within the APC. 3. Peptide-MHC Complex Formation: The peptide fragments are loaded onto MHC molecules. 4. Migration to the Cell Surface: The peptide-MHC complexes are transported to the cell surface. 5. T Cell Interaction: The complexes are recognized by T cell receptors, initiating an immune response.
