Antigens can bind to an antibody at _______ site(s); binding occurs at the _______ regions of the antibody.

Name: Antigens can bind to an antibody at _______ site(s); binding occurs at the _______ regions of the antibody.
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Antigens can bind to an antibody at two sites, as antibodies are Y-shaped molecules with two identical antigen-binding sites at the tips of the Y. These binding sites are located in the variable regions of the antibody, which are specific to the antigen they bind to.

Antigens Can Bind to an Antibody at _______ Site(s); Binding