Antigen
Antigen, when injected in the body activates its specific lymphocytes in the

blood circulation
spleen lymphoid tissue
draining lymph nodes
MALT (mucosa associated

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Antigen
CD antigens

are each expressed on only one cell type
allow leukocytes to recognize antigen
function as receptors for cytokine and CAMs
are expressed on immune cells to mark them for separation

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Antigen
For specific antigen recognition by T cells,

MHC molecules are not required
antigen exposure during T cell maturation is required
denaturation of antigen does not reduce epitope recognition
antigen is bound by a T cell membrane antibody

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