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

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

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Antigen
CD antigens

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

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