(Image: Wikimedia Commons, CC BY 4.0) Exogenous antigens are foreign substances that enter the body from the external environment. Examples include bacteria, viruses, fungi, and other pathogens. These ...
Antigen-presenting cells work to present peptides derived from exogenous and endogenous antigens to circulating T cells, sparking off an immune response. Dendritic cells are unique amongst antigen ...
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