Antigen presentation

Definition

Antigen presentation is the process by which cells display antigen fragments on their surface, allowing T lymphocytes (T cells) to recognize and respond to them. This mechanism is crucial for initiating an adaptive immune response against pathogens or infected cells.

Related terms

Major Histocompatibility Complex (MHC): A set of cell surface proteins essential for the immune system to recognize foreign molecules in vertebrates, playing a critical role in antigen presentation.

T Lymphocytes (T Cells): A type of white blood cell that plays a central role in cell-mediated immunity, differentiating into various types upon activation to perform specific immune functions.

Adaptive Immune Response: The response of antigen-specific lymphocytes, including both T cells and B cells, to foreign pathogens or internal abnormalities, characterized by immunological memory and specificity