Antigen presented by antigen presenting cells is recognized by
|A||T cell receptor|
|B||Fc portion of immunoglobulin|
|C||Fab portion of immunoglobulin|
|D||B cell receptor|
Antigens are processed by antigen presenting cells (macrophages/ dendritic cells).
These processed peptide antigens are presented along with self MHC class II molecules to T cell receptors of CD 4 T lymphocytes. Antigen presenting cells are of two types:
a. Professional: Dendritic cells, Macrophages, B cells
b. Non professional: Pancreatic beta cells.
Nucleated cells presenting antigens to CD8+ T lymphocytes are called Target cells.