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Exogenous Pathway of Antigen Presentation | MHC II Processing
Antigens from the extracellular space and sometimes also endogenous ones,[8] are enclosed into endocytic vesicles and presented on the cell surface by MHC-II molecules to the helper T cells expressing CD4 molecule. Only APCs do express the class II of MHC molecules on the surface in large quantity, such as dendritic cells, B cells or ...
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