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

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

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Antigen
CD antigens

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

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