Antigen presentation. Definition

Medical Definition: antigen presentation

The process by which a host cell (dendritic cell, macrophage or B lymphocyte) processes an extracellular protein antigen to peptides with a length between 10 and 20 amino acids, and subsequently, the associated class II MHC molecules, expressed in the membrane resulting complex that will be presented to CD4 + T lymphocytes. Any cell type capable of processing cytoplasmic proteins, to peptides with a length between 8 and 10 amino acids, and then associate class I MHC molecules to express the resulting complex in the membrane and presented to CD8 + T lymphocytes.

* Automatic translation