Antigen
Which of the following is incorrect with regard to antigen epitopes?

An epitope may be shared by two different antigens
Epitopes may be linear or assembled
B cells bind only processed antigen epitopes
A protein molecule usually contains multiple epitopes

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Antigen
CD antigens

allow leukocytes to recognize antigen
are each expressed on only one cell type
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,

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

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