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
During the lag period between antigen contact and detection of adaptive immunity,

new B and T cells with the appropriate antigen specificity must be produced in the bone marrow
innate immunity blocks the activation of adaptive immune effector cells
innate immune effectors are eliminating antigen
antigen is hidden from the immune system in macrophages

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Antigen
CD antigens

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

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