How do T cells identify pathogens?
Antigen recognition by T cells.
T cells can detect the presence of an intracellular pathogen because infected cells display on their surface peptide fragments derived from the pathogen’s proteins.
These foreign peptides are delivered to the cell surface by specialized host-cell glycoproteins..
What is the role of the T cell?
T cells (also called T lymphocytes) are one of the major components of the adaptive immune system. Their roles include directly killing infected host cells, activating other immune cells, producing cytokines and regulating the immune response.
What are T cells made to identify?
T cell. T cell, also called T lymphocyte, type of leukocyte (white blood cell) that is an essential part of the immune system. T cells are one of two primary types of lymphocytes—B cells being the second type—that determine the specificity of immune response to antigens (foreign substances) in the body.
Do B and T cells attack self antigens?
B and T cells are lymphocytes, or white blood cells, which are able to recognize antigens that distinguish “self” from “other” in the body. B and T cells that recognize “self” antigens are destroyed before they can mature; this helps to prevent the immune system from attacking its own body.
What type of antigen do T cells not recognize?
What types of antigen do T cells NOT recognize? … NK cells attack cancer cells and virus-infected body cells. NK cells are present in the blood, spleen, lymph nodes, and red bone marrow. NK cells attack cells that display abnormal or lack MHC antigens.
How do T cells recognize antigens?
T cells recognize antigens with their antigen receptor, a complex of two protein chains on their surface. They do not recognize self-antigens, however, but only processed antigen presented on their surfaces in a binding groove of a major histocompatibility complex molecule.