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. Author manuscript; available in PMC: 2017 Feb 21.
Published in final edited form as: Autoimmunity. 2012 Feb 23;45(4):320–331. doi: 10.3109/08916934.2012.659299

Figure 2.

Figure 2

Anti-Id presenting the internal image of the antigen. The epitope of an antigen is bound by Ab1. Ab2-β (anti-Id) has an idiotype that is structurally similar to the epitope presented by the antigen. It therefore binds to the antigen-binding site of Ab1 and competes with the antigen for binding to Ab1, thus regulating antibody function.