List the functions of the antigen-binding site and Fc region of antibodies, and briefly describe how each occurs.

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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List the functions of the antigen-binding site and Fc region of antibodies, and briefly describe how each occurs.

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Antigens are molecules that can elicit an immunological response. Each antigen includes unique surface characteristics, known as epitopes, that cause individual reactions. Antibodies (immunoglobins) are Y-shaped proteins generated by immune system B cells to respond to antigen exposure. Each antibody has a paratope that binds to a particular epitope on an antigen, similar to a lock and key binding mechanism. This binding aids in the elimination of antigens from the body, either directly or indirectly.

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