https://doi.org/10.1351/goldbook.12890
Cleavage of protein antigens in antigen-presenting cells (APCs).
Note: The immunogenic peptides interact with the binding sites of major histocompatibility complex (MHC) class II products (exogenous antigens) or with those in MHC class I products (endogenous antigens, including viruses). The processed antigen-MHC complex is recognized by the antigen receptor complex of T lymphocytes.
See also: antigen presentation